The following statements concern elements in the periodic table. Which of the following is true?

A
For Group 15 elements, the stability of+5 oxidation state increases down the group
B
Elements of Group 16 have lower ionization enthalpy values compared to these of Group 15 in the corresponding periods
C
The Group 13 elements are all metals
D
All the elements in Group 17 are gases

Solution:

The electronic configurations of elements of Group 16 correspond to $(n s)^{2} (n p)^{4}$ . These contain one extra electron as compared to half-filled configuration $(n p)^{3}$ of elements of Group 15. This extra electron can be released with lesser ionization enthalpy so as to give stable configurations.

Solution:

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