What is relative isotopic mass?
Mass of one atom of an isotope relative to 1/12th of the mass of an atom of isotope carbon-12
What is relative atomic mass (Ar)?
Weighted average mass of an atom of an element relative to 1/12th mass of an atom of isotope carbon-12
What is a molecule?
Exists as fixed number of atoms with covalent bonds
What is the relative molecular mass?
All atomic masses of molecule added together
What type of substance does the relative formula mass apply to?
Form giant structures eg ionic solids
What is the relative formula mass?
All atomic masses of formula added together