Question

(a) Formula of ion A is A²⁺. Element A probably belongs to _____ group.

(b) In a period, increase in electron affinity increases _______ (oxidation/reduction)

(c) On descending a group, _______ (increase/decrease) in ionisation potential as well as electron affinity _____ (increases/decreases) oxidising capacity.

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Answer 1

Answer:

a) Formula of ion A is A²⁺. Element A probably belongs to _____ group.

Answer 2

Explanation:

a) Formula of ion A is A²⁺. Element A probably belongs to IIA group.

Reason:-

Generally alkaline earth metals will be in the form of A^2+. All alkaline earth metals belongs to IIA group elements.

b) In a period, increase in electron affinity increases oxidation.

Reason:-

Generally, In a period, increase in electron affinity increases oxidation.

c) On descending a group, decrease in ionisation potential as well as electron affinity decrease oxidising capacity.

Reason:-

On moving down the group valency shall become far away from the nucleus and the attraction towards valence electrons decreases which results in decreasing ionization energy. Electron affinity decreases from the top to bottom as atomic size increases and added electron would be farther from the nucleus.

Know More :-

Electron Affinity :-

electron affinity of an element is equals to "the energy released when an electron is added to valence shell of an isolated neutral gas atom".