if an atom has 4 protons, 5 neutrons, and 4 electrons, what is the mass number of this atom? How do you know?

Question

Joe Gross

Chemistry

26 December, 04:45

if an atom has 4 protons, 5 neutrons, and 4 electrons, what is the mass number of this atom? How do you know?

+4

Answers (1)

Know the Answer?

Gillian Powers · Answer 1

Mass number is no of protons and neutrons so it will be 5 and 4 which will give you 9 you'll know because once you get the equation you'll get the answer