Question

multiple choice question
what does an atomic number tell about an atom?
a. the number of neutrons it has
b. the number of protons it has
c. the number of electrons in the outermost level

Explanation:

The atomic number of an atom is defined as the number of protons in its nucleus. In a neutral atom, the number of electrons equals the number of protons, but the atomic number specifically refers to protons. Neutrons are not related to the atomic number, and the atomic number doesn't directly tell about the number of electrons in the outermost level.

Answer:

B. The number of protons it has