Which chalcogon contains same no.of S and P electrons

What name is given to those atoms which contain the same numer of protons and electrons but different number of neutrons ?

The chalogen containing equal number of 's' and 'p' electrons is

Which of the following contains one unpaired electron in the 4p orbitals-

An atom contains the same number of protons and electrons.

The species which contain(s) an odd number of valence electrons are paramagnetic is/are