First slide

Group 14 or carbon family

Question

Which has the same electronic configuration as of inert gas?

Moderate

A

${Ag}^{3 +}$
B

${Cu}^{2 +}$
C

${Pb}^{4 +}$
D

${Ti}^{4 +}$

Solution

${Ti}^{4 +} : 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6},$ i.e. same as Ar.

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