Question

Which elements have electron configurations that end in ns 2 np 5 ? halogens noble gases inner transition metals transition metals?

Answer 1

HALOGENS have 7 electrons in their final shell regardless if the total number of atoms.  These 7 electrons would be shared between the 's' and 'p' orbital in the form ns² np⁵ (the same as the question).  Attached is a table that highlights the fact that halogens have the same form in terms of the valence electrons.