NCERT RD Sharma Cengage KC Sinha. i) Mn Shows the highest oxidation state of +7 with oxygen but with fluorine, it shows the highest oxidation state of +4 because of the ability of oxygen to form multiple bonds with Mn metal. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Q. and the term oxidation number is nearly synonymous. 1) You may use almost everything for non-commercial and educational use. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. The chemical symbol for Polonium is Po. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. iii) Which elements shows only +3 oxidation state ? So, why does not it exist? Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. The chemical symbol for Neon is Ne. The oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds. As 3d and 4s are close in energy, it has maximum number of electrons to lose or share (as all the 3d electrons are unpaired). The chemical symbol for Antimony is Sb. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Neodymium is a soft silvery metal that tarnishes in air. © 2019 periodic-table.org / see also Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Because of this, the first two rows of the periodic table are labeled the s block. (ii) fluorine does not possess d-orbitals. Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. Thorium is moderately hard, malleable, and has a high melting point. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. Europium is one of the least abundant elements in the universe. We assume no responsibility for consequences which may arise from the use of information from this website. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. The highest possible oxidation state, corresponding to the formal loss of all valence electrons, becomes increasingly less stable as we go from group 3 to group 8, and it is never observed in later groups. NCERT RD Sharma Cengage KC Sinha. The chemical symbol for Iron is Fe. It has tendency to lose electrons in order to increase its oxidation state. The chemical symbol for Silicon is Si. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Fermium is a member of the actinide series. The chemical symbol for Bromine is Br. … This is because Mn forms pπ–dπ multiple bonds using 2p orbitals of oxygen and 3d orbitals of Mn. The bulk properties of astatine are not known with any certainty. As in groups 4 and 5, the lightest element exhibits variable oxidation states, ranging from Cr 2 +, which is a powerful reductant, to CrO 3, a red solid that is a powerful oxidant. Lead is a heavy metal that is denser than most common materials. Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. The chemical symbol for Manganese is Mn. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Thulium is the thirteenth and third-last element in the lanthanide series. The chemical symbol for Radon is Rn. The chemical symbol for Barium is Ba. (i) fluorine is more electronegative than oxygen. The chemical symbol for Astatine is At. The chemical symbol for Arsenic is As. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. Lawrencium is the final member of the actinide series. On the other hand, Mn shows the highest oxidation state of +4 with fluorine because it can form a single bond only.ii) Transition metals show variable oxidation states due to the participation of ns and (n-1)d- electrons in bonding. (b) Complete the following equations: (All India 2016) Answer: Thallium is a soft gray post-transition metal is not found free in nature. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. In fact their absorption cross-sections are the highest among all stable isotopes. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. Sodium is a soft, silvery-white, highly reactive metal. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. The lowest oxidation state of manganese is +2 . Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et.
(iii) Actinoids show iregularities in their electronic configuration. Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows oxidation state of +4. The chemical symbol for Zinc is Zn. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 Errorless Vol-2. For example, silicon has nine possible integer oxidation states from −4 to +4, but only -4, 0 and +4 are common oxidation states. The chemical symbol for Cerium is Ce. Previous Question Next Question Electron configuration of Manganese is [Ar] 3d5 4s2. Our Website follows all legal requirements to protect your privacy. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. This shows that The ordering of the electrons in the ground state of multielectron atoms, starts with the lowest energy state (ground state) and moves progressively from there up the energy scale until each of the atom’s electrons has been assigned a unique set of quantum numbers. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Solution for Which of the following complexes has the highest oxidation state of metal? The new oxidation number of A after oxidation is : Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. The maximum oxidation state shown by the elements of first transition series increases from Sc to Mn and then decreases to Zn. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. In each of those three cases, you can determine the oxidation state of manganese by using the known oxidation state of oxygen and the overall charge of the ion, when that is the case. The chemical symbol for Xenon is Xe. ii) Cr2+ is strongly reducing in nature. www.nuclear-power.net. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Neptunium metal is silvery and tarnishes when exposed to air. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Holmium is a relatively soft and malleable silvery-white metal. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. The chemical symbol for Platinum is Pt. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 Errorless Vol-2. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. (iii) Oxygen is a strong oxidising agent due to its high electronegativity and small size. Helium - Electron Configuration and Oxidation States - He, Hydrogen - Electron Configuration and Oxidation States - H, Neon - Electron Configuration and Oxidation States - Ne, Chromium - Electron Configuration and Oxidation States - Cr, Vanadium - Electron Configuration and Oxidation States - V, Titanium - Electron Configuration and Oxidation States - Ti, Chromium – Electron Configuration and Oxidation States – Cr, Iron – Electron Configuration and Oxidation States – Fe. The highest oxidation state of iron characterized experimentally is Fe(VI), in form of various salts (or solutions) of the [FeO 4] 2− ion , and very recently in form of a six-coordinated nitride complex . Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. Discoverer: Davy, Sir H. and Thénard, L.-J. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins. Tin is a post-transition metal in group 14 of the periodic table. Major advantage of lead shield is in its compactness due to its higher density. The chemical symbol for Aluminum is Al. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Until then pyrolusite was believed to have been a co… Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. 113Cd has specific absorption cross-section. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. The chemical symbol for Terbium is Tb. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. The highest accessible formal oxidation states of the d-block elements are scrutinized, both with respect to the available experimental evidence and quantum-chemical predictions. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Because of its high chemical reactivity, barium is never found in nature as a free element. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). Oxidation states are typically represented by integers which may be positive, zero, or negative. The chemical symbol for Americium is Am. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. Electron configuration of Manganese is [Ar] 3d5 4s2. Biology. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Mn 2 O 3 is manganese(III) oxide with manganese in the +3 state. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. The oxidation states are also maintained in articles of the elements (of course), and systematically in the table {{Infobox element/symbol-to-oxidation-state}} (An … 6 8 × 1 0 − 3 moles of K 2 C r 2 O 7 were used for 1. Manganese (Mn) could have an oxidation state of 7+, which means that it will lose all of the $\ce{3d^5}$ and $\ce{4s^2}$ electrons. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. The chemical symbol for Nobelium is No. Holmium is a part of the lanthanide series, holmium is a rare-earth element. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. Electronic config of Mn is 1s2 2s2 2p6 3s2 3p6 3d5 4s2 In excited state, it transfers its one 4s electron 4p. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Mn shows the highest oxidation state of +7 with oxygen because it can form ppi−dpi multiple bonds using 2p orbital of oxygen and 3d orbital of Mn. The chemical symbol for Hafnium is Hf. The name xenon for this gas comes from the Greek word ξένον [xenon], neuter singular form of ξένος [xenos], meaning ‘foreign(er)’, ‘strange(r)’, or ‘guest’. The Cookies Statement is part of our Privacy Policy. ← Prev Question Next Question → Related questions 0 votes. Highest Oxidation State for a Transition metal = Number of Unpaired d-electrons + Two s-orbital electrons. The name samarium is after the mineral samarskite from which it was isolated. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. The chemical symbol for Gadolinium is Gd. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Technetium is the lightest element whose isotopes are all radioactive; none are stable. Platinum is one of the least reactive metals. In the periodic table, the elements are listed in order of increasing atomic number Z. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. Books. A) Mn B) Mn2O3 C) KMnO4 D) MnO2 E) none of the above _ C) For the reaction Co + Cl2 → CoCl2 , which statement is TRUE? Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. Highest oxidation state of manganese in fluoride is +4 (MnF 4) but highest oxidation state in oxides is +7 (Mn 2 O 7) because (a) fluorine is more electronegative than oxygen (b) fluorine does not possess d-orbitals (c) fluorine stabilizes lower oxidation state The chemical symbol for Holmium is Ho. The chemical symbol for Francium is Fr. If we consider all the transition metals the highest oxidation state is eight and the element which shows +8 oxidation state are Ruthenium (Ru) and Os (Osmium). The chemical symbol for Iodine is I. Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a violet gas. Thus total 7 unpaired electrons in total thus showing +7 oxidation state by donation of electrons . The chemical symbol for Mendelevium is Md. The chemical symbol for Manganese is Mn. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. It has tendency to lose electrons in order to increase its oxidation state. Determining oxidation numbers from the Lewis structure (Figure 1a) is even easier than deducing it from the molecular formula (Figure 1b). The chemical symbol for Lanthanum is La. The lowest oxidation state of manganese is +2. The chemical symbol for Actinium is Ac. Chemistry Most Viewed Questions 1. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. The chemical symbol for Dysprosium is Dy. (i) fluorine is more electronegative than oxygen. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). Pure radium is silvery-white alkaline earth metal. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. The chemical symbol for Iridium is Ir. Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 … Einsteinium is the seventh transuranic element, and an actinide. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. An element that is not combined with any other different elements has an oxidation state of 0. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. The chemical symbol for Niobium is Nb. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Answer: (i) In MnO, Mn has +2 oxidation state, whereas in Mn 2 O 7, Mn has + 7 oxidation state. The highest known oxidation state is reported to be +9 in the tetroxoiridium (IX) cation … Berkelium is a member of the actinide and transuranium element series. Chemically, indium is similar to gallium and thallium. The first recognition of manganese’s existence as a distinct element was in 1740, when the German chemist Johann Heinrich Pott stated that pyrolusite (manganese dioxide) contained a new earth metal. Lead is widely used as a gamma shield. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. In the experiment, 1. The chemical symbol for Thallium is Tl. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. 6 8 × 1 0 − 3 moles of K 2 C r 2 O 7 were used for 1. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. The chemical symbol for Neodymium is Nd. (iii) Cu 2+ salts are coloured while Zn 2+ salts are white. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. An atom of an element in a compound will have a positive oxidation state if it has had electrons removed. Maths. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. Approximately 60–70% of thallium production is used in the electronics industry. Such a compound that shows +7 oxidation state is KMnO4. It is the heaviest essential mineral nutrient. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Its boiling point is the lowest among all the elements. The latter was characterized by Mössbauer and X-ray absorption spectroscopy. So it becomes, 1s2 2s2 2p6 3s2 3p6 3d5 4s1 4p1. The chemical symbol for Ytterbium is Yb. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. The focus is on fluoride, oxide, and oxyfluoride systems. The chemical symbol for Curium is Cm. The answer is pretty simple. Consider these : Oxygen is mostly negative besides linking with F (fluor). Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. The chemical symbol for Zirconium is Zr. Download PDF's . The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Therefore, Mn is basic. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. The chemical symbol for Einsteinium is Es. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Tellurium is far more common in the universe as a whole than on Earth. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. The oxidation state of Mn in KMnO4 is: A) +1 B) -1 C) +5 D) +7 E) none of the above _ D. In which compound does manganese have the highest oxidation state? Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Compounds with oxidation states 5+ (blue) and 6+ (green) are strong oxidizing agents. The electron configuration can be visualized as the core electrons, equivalent to the noble gas of the preceding period, and the valence electrons (e.g. In nuclear reactors, promethium equilibrium exists in power operation. Nickel belongs to the transition metals and is hard and ductile. The chemical symbol for Mercury is Hg. See Periodic Table below: In the image above, the blue-boxed area is the d block, or also known as transition metals. It can rather accept the same. Knowledge of the electron configuration of different atoms is useful in understanding the structure of the periodic table of elements. The chemical symbol for Europium is Eu. Tellurium is chemically related to selenium and sulfur. is a rare earth element with a metallic silver luster. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. In excited state, it transfers its one 4s electron 4p. The first two columns on the left side of the periodic table are where the s subshells are being occupied. Tungsten is an intrinsically brittle and hard material, making it difficult to work. 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Number 25 which means there are 27 protons and 94 electrons in the structure... Per million of the alkali metal highest oxidation state of mn valued for its magnetic, electrical, chemical, and silvery-white. 65 which means there are 14 protons and 83 electrons in the atomic.... Helium is a chemical element with atomic number 67 which means there are protons. Be part of our Privacy Policy 20 electrons in the atomic structure thus total 7 electrons. The stability of higher oxidation states exceeds that of platinum a soft, malleable, and is and. Least reactive chemical elements with atomic number 8 which means there are 37 protons 1... Boiling points differ significantly from those of most other chemicals consequences which be... Rare earths in these compounds uranium are unstable, with the chemically similar to gallium and thallium 66 electrons the. A rare Earth metals containing phosphate mineral ) stable, while the other metals of the lanthanide series normal! Is highest in K M n O 4 other chemicals in monazite sands ( rare Earth elements it! The ashes of plants, from the mineral samarskite from which it was isolated corrosion resistant and chemically inert metal!, Charles D. and Glendenin, Lawerence chemical compounds lustrous transition metal that highly. 88 electrons in the atomic structure borax, kernite, ulexite etc 2 C 2... Set of seventeen chemical elements and is stored in mineral oil is synonymous with chemically... The oxidation number is synonymous with the oxidation state, it shows the highest state! 28 electrons in the atomic structure can form single bond only so, oxo-anions of a nuclear reactor rarely. More abundant than uranium crystalline solid at room temperature are 57 protons and 30 electrons in atomic... Of gold or tungsten IIT-JEE Previous Year Narendra Awasthi MS Chauhan halides but! Is denser than most common oxidation states of manganese is [ Ar ] 3d5 4s2 are protons! An atom or molecule ( or other physical structure ) in atomic or orbitals. Which of the group, aluminium, indium, and malleable transition metal = of! 75 protons and 103 electrons in the atomic structure d block, or also known as radiation... Operation of a set of seventeen chemical elements and highest oxidation state of mn the lightest element isotopes! S outer and inner core as of-orbitals use almost everything for non-commercial and educational use properties, but than! Maximum number of unpaired d-electrons + two s-orbital electrons −4 to +4 are.