Question

The radius of cation is always
less than radius of atom. Explain with example​

Answer 1

Answer:

The radius of cation is always  less than radius of atom

Explanation:

An atom becomes a cation when it releases an electron.

For example take the case of magnesium

it has 12 electrons and 12 protons

When it releases an electron it becomes Mg⁺ and it is left with 12 protons and 11 electrons.

in the beginning 12 protons pulled 12 electrons

no 12 protons are pulling 11 electrons so the pulling strength increases and the shells come closer and thus the atomic radius decreases.

12 electrons ≡ 12 protons

After losing electron

11 electrons ≡ 12 protons

1 electron ≡ 12 / 11 protons

1 electron ≡ 1.1 protons