Question

each period in the periodic table corresponds to a(n) _____.
orbital
energy sublevel
suborbital
principal energy level

Explanation:

In the periodic table, the periods (rows) are related to the principal energy levels of the electrons in an atom. As we move down a group (column), the principal energy level increases. Orbitals are regions within a principal energy level where electrons are likely to be found. Energy sublevels (like s, p, d, f) are part of a principal energy level. The term "suborbital" is not a standard term in this context.

Answer:

principal energy level