Question

what corresponds to the atomic number?
○ number of hits
○ number of protons
○ number of electrons
○ number of neutrons

Explanation:

In atomic structure (a concept in Chemistry, a subfield of Natural Science), the atomic number of an element is defined as the number of protons in the nucleus of an atom of that element. The number of electrons in a neutral atom equals the number of protons, but the atomic number is fundamentally defined by protons. "Number of hits" is irrelevant, and "number of neutrons" relates to the mass number (when combined with protons) but not the atomic number.

Answer:

B. number of protons