If an atom has 34 protons and 40 neutrons, what is its mass number?

asked Jul 9, 2017 171k views

2 votes

9.2k points

Please log in or register to add a comment.

5 votes

The answer is 74

The mass equals the number protons and neutrons.

34+40= 74

Katiana answered Jul 10, 2017

8.7k points

4 votes

Mass number is the total of neutrons and protons added together therefore it is 34+40 which is 74. This is the mass number for the atom.

Jason Frank answered Jul 15, 2017

8.2k points

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers