Embibe Experts Solutions for Chapter: Periodic Table and Periodicity in Properties, Exercise 1: West Bengal Board-2020

What is meant by ionisation energy of an atom of elements? Arrange $\mathrm{Li}, \mathrm{Rb}, \mathrm{K}$ and $\mathrm{Na}$ in the increasing order of their ionisation energy.

Mention similarity of properties of hydrogen with one property of Group $\mathrm{I}$I elements and two properties of Group $17$ elements.

The alkaline earth metals are placed in which group of the periodic table?

Which of the following is not a periodic property of elements?

Mention the dissimilarity of properties of hydrogen with one property of group 1 elements and two properties of group 17 elements.

Arrange as directed:

$\mathrm{Na} \left(11\right), \mathrm{K} \left(19\right). \mathrm{Li} \left(3\right), \mathrm{Rb} \left(37\right)$ belonging to Group 1 of the long periodic table according to decreasing order of atomic radius.

(The atomic numbers have been given within first brackets after the symbols of the elements)

Arrange as directed:

$\mathrm{S} \left(16\right), \mathrm{O} \left(8\right), \mathrm{Te} \left(52\right), \mathrm{Se} \left(34\right)$ belonging to Group 16 of the long periodic table according to increasing order of electronegativity. 

(The atomic numbers have been given within first brackets after the symbols of the elements) 

Arrange as directed:

$\mathrm{Ca} \left(20\right), \mathrm{Be} \left(4\right), \mathrm{Sr} \left(38\right), \mathrm{Mg} \left(12\right)$ belonging to Group 2 of the long periodic table according to decreasing order of reducing power. 

(The atomic numbers have been given within first brackets after the symbols of the elements)