Question

how many protons are in a neutral atom of beryllium (be)? how many electrons?
number of protons =
number of electrons =

Explanation:

Step1: Recall atomic number of Be

Beryllium (Be) has an atomic number of 4. The atomic number equals the number of protons. So, number of protons = 4.

Step2: Neutral atom electron - proton relation

In a neutral atom, the number of electrons equals the number of protons. So, number of electrons = number of protons = 4.

Answer:

Number of protons = 4; Number of electrons = 4