Question

In a given energy level (n), the order of penetration effect of different orbitals is:

• A. $f<d<p<s$
• B. $s=p=d=f$
• C. $s<p<d<f$
• D. $p>s>d>f$

Answer 1

The correct option is A $f<d<p<s$

Electron penetration is defined by the relative electron density (probability density) near the nucleus of an atom. It depends on the shell and the sub shell.
For example, for n = 2, 2s orbital has more electron density near the nucleus than 2p orbital.
For the given energy level (n), the order of the penetration effect is
$f<d<p<s$