Question

the atomic number comes from... a. the number of protons. b. the number of electrons. c. the number of neutrons. select an answer

Explanation:

The atomic number of an element is defined as the number of protons in the nucleus of an atom of that element. Electrons are involved in chemical - bonding and can be gained or lost in ions. Neutrons contribute to the mass number (along with protons) but not the atomic number.

Answer:

A. the number of protons.