Avogadro - The person credited with the value for the mole, Cations - Positively charged ions are called....., Negative - Anions have this charge, Isotopes - Different versions of the same element are called, Abundance - Relative atomic mass takes this factor into account, Formula mass - Mr is, Grams - The unit we use for mass in chemistry, Mass - This quantity is equal to Mr x Mole, Protons - The number of these defines an element, Compounds - These are formed from more than one type of atom chemically joined,

Quantitative chemistry

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