Question

in period 3, there are 8 elements. what sublevel(s)/orbitals is(are) being filled? select all that apply. options: s, p, d, f (with some ocr typos in the original)

Explanation:

In period 3, the electron configuration starts with filling the 3s sublevel (2 elements: Na, Mg) and then the 3p sublevel (6 elements: Al - Ar), totaling 8 elements. The s sublevel (3s) and p sublevel (3p) are filled here. The d sublevel starts filling in period 4, and f in period 6. So s and p sublevels are involved.

Answer:

s, p