Question

Which of the following has highest radius?

• A. 1s
• B. 2p
• C. 2s
• D. all are equal

Answer 1

Answer: (C)

2s

Since more contraction of inner orbital takes place$,$ as a result radius of $1s$ is smaller than $2s$ or $2p,$ since$,$ $2s$ is more spherical than $2p,$ hence $2s$ has more radii than $1s$ or $2p.$