Question

The number 80 in the name bromine-80 represents
a. the mass number.
b. the sum of protons and electrons.
c. the atomic number.
d. none of the above.

Answer 1

The number 80 in the name bromine-80 represents
A. The mass number 

Answer 2

It's A because the protons and electrons are much smaller numbers. the mass of bromine is 79.9 so it's A