Question

10 points

3. What is the total number of subatomic particles for an atom of Lithium
with an atomic mass of 7?
O
10
8

Answer 1

Hey there!

Lithium has 3 protons.

Assuming this is a neutral atom, that means it will also have 3 electrons.

Atomic mass is the sum of protons and neutrons. We have 7 total protons and neutrons, and 3 electrons.

7 + 3 = 10

The total number of subatomic particles is 10.

Hope this helps!