Question

In the following electronic configuration $n{s}^2(n-1)d^{0-1}(n-2)f^{1-14}$. If value of $(n-1)=6$ the configuration will be of:

• A. lanthanides
• B. d - block
• C. actinides
• D. s - block

Answer 1

The correct option is C actinides

In the following electronic configuration $n{s}^2(n-1)d^{0-1}(n-2)f^{1-14}$ If value of $(n-1)=6$ the configuration will be of
Actinides.
$n-1=6$ then $n=7$ and $n-2=5$. The electronic configuration will be $7s^{2}6d^{0-1}5f^{1-14}$ which is characteristic of actinides.