Question

1. why are the ionic radii generally larger for group 15 than for group 17?

a. ions forming from group 15 atoms have a greater negative charge than ions forming from group 17 atoms.
a. atoms in group 15 are larger than atoms in group 17.
atoms in group 15 are less likely to lose electrons than atoms in group 17.
a. atoms in group 15 have more protons than atoms in group 17

Explanation:

Group 15 elements form ions with a -3 charge (e.g., \(N^{3 -}\)), while group 17 elements form ions with a -1 charge (e.g., \(Cl^{-}\)). When comparing ions of the same period (if applicable, but even across periods in general for the groups), for isoelectronic (same number of electrons) or non - isoelectronic cases, a greater negative charge on group 15 ions leads to less effective nuclear charge attraction per electron. This causes the electron - electron repulsions to spread the electrons out more, resulting in larger ionic radii for group 15 ions compared to group 17 ions.

Answer:

a. Ions forming from group 15 atoms have a greater negative charge than ions forming from group 17 atoms.