Question

which orbitals hold an atoms valence electrons? *
○ d & f
○ s & p
○ p & d
○ s & f

Explanation:

Valence electrons are the outermost electrons involved in bonding. For main - group elements, the valence electrons are in the s (from the outermost s - subshell) and p (from the outermost p - subshell) orbitals. d and f orbitals are usually in inner shells (or for transition/inner - transition metals, but the question is about general valence electron - holding orbitals, and s & p are the primary ones for valence electrons in most cases).

Answer:

B. s & p