Web(a) The ability of the transition metal to exhibit variable valency is generally attributed to the availability of more electrons in the (n-1)d orbitals which are closer to the outermost ns orbital in energy levels. Thus in the case of iron, we get the divalent Fe(II) state when only the 2 electrons in the 4s orbital are removed. And we get the trivalent Fe(III) state when …

Why elements show variable valency? - BYJU

WebValency of Iron: The atomic number of iron is 26. The electronic configuration of the element is: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 6. Therefore, the valency of iron is 2 and 3. Iron and copper have variable valency because they show involvement of vacant d-orbitals and electrons from outermost and penultimate shells are involved in the ... Web9 rows · Valency may also be defined as the number of electrons that an atom donates or accepts to form the duplet state (i.e., 2 electrons in outermost shell) or octet state (i.e., 8 … truffles fortnum and mason

Zinc and mercury do not show variable valency like d …

WebThe valence of an element is its ability to combine with other elements. The capacity of some elements to interact with other elements varies depending on the nature of the … WebApr 6, 2024 · Thus, its valency is 3. Scandium – Atomic number of scandium is 21. It is also a transition element but it doesn’t show variable valences. Its electronic configuration is … WebOct 12, 2024 · For example : Iron has valency of 2 and 3 such that it can join with with oxygen to produce both FeO (using valency 2) and Fe2O3 (using valency 3). In the above options, all other elements (apart from hydrogen) have variable valency. Mercury has valency 1 and 2. Copper has valency 1 and 2. Iron has valency 2 and 3. Hence , these … philip johnson projects