A) 4 p
B) 4 d
C) \[4f\]
D) 3s
Correct Answer: D
Solution :
s-subshell has only one orbital and it is spherical in shape hence, 5-orbitals are non-directional and spherically symmetrical. This means that the probability of finding the electron is same in all directions. p-subshell has three p-orbitals i.e. \[{{p}_{x}},{{p}_{y}}\] and \[{{p}_{z}}\] d-subshell has five d-orbitals i.e., \[{{d}_{xy}}\,{{d}_{yz}}\,{{d}_{zx}}\,{{d}_{{{x}^{2}}-{{y}^{2}}}}\,d_{z}^{2}\] \[f\]-subshell has seven \[f\]-orbitals. Therefore, in the given orbitals 3s is non-directional orbital.
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