Asked in ChemistryElements and CompoundsAtoms and Atomic Structure
What is the mass number of an element?
April 21, 2016 6:31AM
The mass number of an element is the total mass of atoms in an element (i.e protons, electron and neutrons).
If you were to look on a periodic table element square the mass number is the number above the element letter while the number below is the atomic number
E.g. If you look on a periodic table the mass number of Oxygen (O) is 16.0
mass number is the atomic mass of a particular isotope