Embibe Experts Solutions for Exercise 1: ICSE-2018

Give one phrase for the following statement:

Process of formation of ions from molecules which are not in the ionic state.

Give one phrase for the following statement:

The energy released when an electron is added to a neutral gaseous isolated atom to form a negatively charged ion.

Give a reason for the following:

Inert gases do not form ions.

Give a reason for the following.

Alkali metals are good reducing agents.

Arrange the following according to the instructions given in bracket:

$\mathrm{Li}, \mathrm{K}, \mathrm{Na}, \mathrm{H}$ (In the decreasing order of their ionisation potential)

Arrange the following according to the instruction given in bracket:

$\mathrm{F}, \mathrm{B}, \mathrm{N}, \mathrm{O}$ (In the increasing order of electron affinity)

Name the following element:

• An alkaline earth metal present in group $2$ and period $3$.

Name the following element:

• A trivalent metal used to make light tools.