Question

Q6-(1)-Name the members of alkali metal group which has the

Highest ionization energy

Answer 1

The Alkali metal group is group 1 of the periodic table which has the following elements:

Hydrogen (H)

Lithium (Li)

Sodium (Na)

Potassium (K)

Rubidium (Rb)

Cesium (Cs)

Francium (Fr)

Ionization energy is the energy required to lose the electrons from an atom.

Periodic trend:

Ionization energy of atoms decreases down the group because the number of shell is increasing which results in the increase in distance between the nucleus and outermost shell.

Due to this, the atom present at the bottom of a group has the least ionization energy and the one present at the top has the highest ionization energy.

Hence, the metal with highest ionization energy is Lithium.