Question

Which of the following elements has the highest atomic mass?

Helium: 2 protons and 2 neutrons
Nitrogen: 7 protons and 7 neutrons
Oxygen: 8 protons and 8 neutrons
Hydrogen: 1 proton and no neutrons

Answer 1

I believe oxygen is your answer.

Answer 2

The answer to the question is oxygen (c)