First slide

Periodic Trends

Question

Which one is a wrong statement?

Moderate

A

Total orbital angular momentum of electron in s -orbital is equal to zero.
B

An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
C

The electronic configuration of N atom is
D

$The value of m for d_{z}^{2} is zero .$

Solution

$orbital angular momentum = \sqrt{l (l + 1)} \frac{h}{2 π}; for s orbitals l = 0$ ; $n, l, m are enough to designate orbital but n, l, m, s are required to designate electron$
According to quantum mechanical model of atom ,the magnetic quantum number for $p_{z} = 0; d_{z^{2}} = 0$
According to Hund's rule of maximum multiplicity, the correct configuration of ‘ N’ is

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