The quantum numbers of an atom's highest-energy valence electrons are n = 5 and l = 1.The element to which this atom belongs could be a
A)inner transition metal.
B)alkali metal.
C)s-block main-group element.
D)transition metal.
E)p-block main-group element.

Question

Quizplus · Accepted Answer

The quantum numbers n = 5 and l = 1 suggest that the valence electrons are in the 5p subshell, which is a characteristic of p-block main-group elements. Therefore, the best choice is E, p-block main-group element.

The Quantum Numbers of an Atom's Highest-Energy Valence Electrons Are