Question

Define Atomic radius

Answer 1

Atomic radius is the distance from the centre of the nucleus to the outermost shell of electrons.

• The atomic radius in the periodic table generally decreases as moving from left to right across a period.
• And it increases as you move down a group.
• Atomic radius depends on the number of protons, the number of energy levels holding electrons, and the number of electrons held between the nucleus and its outermost electrons which is known as the shielding effect.