Embibe Experts Solutions for Chapter: Periodic Table and Electronic Configuration, Exercise 1: Kerala Board-2018

The atomic number of an element is 19.

Write any one characteristic of the block to which the element belongs. 

What is the maximum number of electrons that can be accommodated in the 'f' subshell?

Select the correct subshell configuration of  ${}_{24}\mathrm{Cr}$ from the following:

(i) $1{\mathrm{s}}^2 2{\mathrm{s}}^2 2{\mathrm{p}}^6 3{\mathrm{s}}^2 3{\mathrm{p}}^6 3{\mathrm{d}}^{4 }4{\mathrm{s}}^2$

(ii) $1{\mathrm{s}}^2 2{\mathrm{s}}^2 2{\mathrm{p}}^6 3{\mathrm{s}}^2 3{\mathrm{p}}^6 3{\mathrm{d}}^5 4{\mathrm{s}}^1$

Select the correct subshell configuration of ${}_{24}\mathrm{Cr}$ from the following:

Write the reason for selecting this configuration.

The outermost subshell electronic configuration of an element is $3{\mathrm{d}}^5 4{\mathrm{s}}^2$.

Write the complete subshell electronic configuration of this element

The outermost subshell electronic configuration of an element is $3{\mathrm{d}}^5 4{\mathrm{s}}^2$.

Write the atomic number of the element.

The outermost subshell electronic configuration of an element is ${\mathrm{d}}^5 4{\mathrm{s}}^2$.

Identify its block and period.

The outermost subshell electronic configuration of an element is $3{\mathrm{d}}^5 4{\mathrm{s}}^2$.

This element shows a variable oxidation state why?