The increasing order of the atomic radius of Si,S,Na, Mg, Al is

Options

A. `S lt Si lt Al lt Mg lt Na`
B. `Na lt Al lt Mg lt S lt Si`
C. `Na lt Mg lt Si lt Al lt s`
D. `Na lt Mg lt Al lt Si lt S`

Answer

A

Explanation

Nuclear charge `prop(1)/("Atomic radius")`
Since, nuclear charge increases from left to right in a period, the correct order is:
`SltSiltAlltMgltNa`.