Beryllium, the first member of group 2, shows an anomalous behavior as compared to Mg and the rest of the members on account of

The last member of group 18 is:

Why is nitrogen anomalous in its behaviour as compared to other members of its group ?

Boron shows anomalous behaviour and differs from the rest the members of its family - why ?

Why does the first element in a group show anomalous behaviour. Give a reason

Why does the first elements in a group show anomalous behaviour. Give a reason.

Carbon, the first member of group 14 , shows an anomalous behavior because of (i) its exceptinally small atomic and ionic size (ii) its higher electronegativity (iii) its higher ionization enthalpy (iv) the absence of vacant d -orbitals in the valence shell