Question

Two elements ‘$\text{P}$’ and ‘$\text{Q}$’ belong to the same period of the modern periodic table and are in group $1$ and group $2$ respectively. Compare the following characteristics in tabular form.
(a) number of electrons in their atoms.

Answer 1

The characteristics of the elements $\text{P}$ and $\text{Q}$ are given in the table below:

SI. No.	Property	Element P (group $1$)	Element Q (group $2$)
a)	number of electrons in their atoms	$1$ (valence electron)	$2$ (valence electron)