Arrange each of the following sets of atoms and ions, in order of increasing size: (a)...

Question

Question

Arrange each of the following sets of atoms and ions, in order of increasing size: (a) Sea., S2, Sn2+; (b) 02, K+, Rb+. The a

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Answer 1

Answer #1

Size of anions increases by gaining the electrons.

Size of cations decreases by loosing the electrons.

Se^2- = 198 pm

S^2- = 184 pm

Sn²⁺ = 118 pm

Increasing order of ion sizes. a) Sn²⁺ < S^2- < Se^2-

Rb⁺ = 152 pm

K⁺ = 138 pm

O^2- = 140 pm

Increasing order of ion sizes. b) K⁺ < O^2- < Rb⁺

Answer 2

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