depends on the electrons
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because the electrons plus the nuetrons equal the mass
Yes, electrons have a mass of 9.1094 X 10−31 kg.
electrons are the same as protons
Atomic number : 26Atomic mass : 55.845 Net charge : +3
If you know the mass of one mole of those atoms (the mass number listed on the periodic table), then you divide that number by Avogadro's constant: 6.022x10^23 which gives you the mass of one single atom