Question

Arrange K+, Cl, Cl-, K, Na in order of increasing size

Answer 1

Solution:

K: 1s²2s²2p⁶3s²3p⁶4s¹   radius of the neutral atom = 0.231 nm

K⁺: 1s²2s²2p⁶3s²3p⁶  radius  of the ion= 0.133 nm

Cl: 1s²2s²2p⁶3s²3p⁵  radius of the neutral atom = 0.099 nm

Cl^- : 1s²2s²2p⁶3s²3p⁶  radius of the ion = 0.181 nm

Na: 1s²2s²2p⁶3s¹  radius of the neutral atom = 0.186 nm

And then, in order of increasing size are Cl, K⁺, Cl^-, Na, K

Answer: in order of increasing size are Cl, K⁺, Cl^-, Na, K