$\begin{array}{1 1}(1) \text{ All the elements in Group 17 are gases.} \\ \text{(2) The Group 13 elements are all metals.} \\ \text{(3) Elements of Group 16 have lower ionization enthalpy values compared to those of Group 15 in the corresponding periods.} \\ \text{(4) For Group 15 elements, the stability of +5 oxidation state increases down the group} \end{array} $
