If an isotope of mercury has 95 neutrons, what is the atomic mass

Question

i'm having a little trouble with this, any help would be greatly appreciated.

Answer 1

If you find mercury in the periodic table, you can see it's the element number 80, which means it has 80 protons. Nuclei of atoms consist of protons and neutrons that give it its atomic mass when combined. You have 80 protons and 95 neutrons, so, what's gonna be the atomic mass for this isotope then?