Question

___________ number of an atom equal to the number of protons and electrons in its nucleus​

Answer 1

Explanation:

Since atoms are neutral, the number of electrons in an atom is equal to the number of protons. Hydrogen atoms all have one electron occupying the space outside of the nucleus. Helium, with two protons, will have two electrons.

Answer 2

Answer:

_____Since atoms are neutral, the number of electrons in an atom is equal to the number of protons. Hydrogen atoms all have one electron occupying the space outside of the nucleus. Helium, with two protons, will have two electron______ number of an atom equal to the number of protons and electrons in its nucleus