The atom of the element having atomic number $14$ should have:

In which of the following pairs of orbitals is the probability of finding the electron zero in the $XY$ plane?

Which of the following statements are correct?
$(a)$ When an electron in an atom moves from $n=4$ to $n=2$,it gains energy.
$(b)$ An electron in a $3p$ orbital would have less energy than an electron in a $2p$ orbital.
$(c)$ $A$ $3s$ subshell has a maximum of $2$ electrons.
$(d)$ $A$ $3^{rd}$ orbit may contain a maximum of $10$ electrons.

The principal quantum number of an atom is related to the:

If $n = 6,$ the correct sequence for filling of electrons will be

The valence electrons in the carbon atom are