What is the mass of an atom that has 4 protons, 5 neutrons, and 4 electrons?

Question

asked Oct 10, 2018 211k views

2 Answers

Deepanjan Nag · Answer 1 · 2018-10-16T12:01:51+0000

To get the mass, you would add the 4 protons and 5 neutrons so it would be 9.
(The electrons weigh practically nothing so you just ignore them.)