Dalton’s Atomic Theory. Elements - made up of atoms Same elements, same atoms. Different elements, different atoms. Chemical reactions involve bonding of atoms. The Atom. Made up of: Protons – (+) charged Electrons – (-) charged neutrons. Periodic Table. Alkaline Metals – Grps. I & II
Isotopes % Abundance
12C 98.89 %
13C 1.11 %
Mole = mass of element formula weight of element
1 mole of C = 12.011 grams
One mole of anything is 6.02 x 1023 units of that substance.
atomic mass of element