Question

Which of the following general electronic configuration for transition elements is NOT correct?

• A. $(n+1)s^{1-2}n{d}^{1-30}$
• B. $n{s}^{1-2}(n-1)d^{1-10}$ (Where n = 2,3,4 ........)
• C. $n{s}^{1-2}(n-1)s^2{p}^6{d}^{1-10}$
• D. $(n-1)d^{1-10}n{s}^{0-2}$

Answer 1

Answer: (A), (B)

The correct options are
A $(n+1)s^{1-2}n{d}^{1-30}$
B $n{s}^{1-2}(n-1)d^{1-10}$ (Where n = 2,3,4 ........)

$n{s}^{1-2}(n-1)d^{1-10}$ (Where n = 2,3,4 ........) is incorrect configuration for transition elements. d orbitals starts from 3 shell so when n= 4,5,6.. the only this configuration can be correct. The general configuration for transition elements will have valence electron in ns and (n-1) d shell.