Question

A beryllium atom contains 4 protons, 4 neutrons and 4 electrons. What is the atomic number of beryllium?

Answer 1

the atomic number 4

Step-by-step explanation:

Answer 2

Beryllium's atomic number is 4

Step-by-step explanation:

Reason

1. Beryllium has 4 protons, 4 neutrons, and 4 electrons.
2. This makes it a nuetral atom meaning that it contains an equal amount of protons and electrons
3. This means that beryllium has a atomic number of 4