Question

The element which has the greatest atomic radius is:

• A. Chlorine
• B. Magnesium
• C. Phosphorus
• D. Sodium

Answer 1

The correct option is D

Sodium

• Atomic radius is the distance from the nucleus of an atom to the outermost orbital of its electron.
• Atomic radius decreases as we move from left to right in a period with an increase in the nuclear charge of the element.
• As we move down the group the atomic radius increases because of an extra shell.
• As atomic size decreases across a period sodium (Na) atom is larger than that of others.

Option D is the correct option.