Question

Beryllium-9
Neutrons:
Protons:
Electrons:

Answer 1

Neutrons - 5

Protons - 4

Electrons - 4

Step-by-step explanation:

Beryllium (Be) is the 4th element on the Periodic Table.

It has 4 protons and 4 electrons (neutral charge)

Atomic Mass = # of Protons + # of Neutrons

9 = 4 + x

x = 5 Neutrons