The Elements, sorted by Atomic Mass
Atomic Number Symbol Name Atomic Weight (amu, g/mol) 1 H Hydrogen 1.00797 2 He Helium 4.00260 3 Li Lithium 6.941 4 Be Beryllium 9.01218 5 B Boron 10.81 6 C Carbon 12.011 7 N Nitrogen 14.0067 8 O Oxygen 15.9994 9 F Fluorine 18.998403 10 Ne Neon 20.179 11 Na Sodium 22.98977 12 Mg Magnesium 24.305 13 Al Aluminum 26.98154 14 Si Silicon 28.0855 15 P Phosphorus 30.97376 16 S Sulfur 32.06 17 Cl Chlorine 35.453 19 K Potassium 39.0983 18 Ar Argon 39.948 20 Ca Calcium 40.08 21 Sc Scandium 44.9559 22 Ti Titanium 47.90 23 V Vanadium 50.9415 24 Cr Chromium 51.996 25 Mn Manganese 54.9380 26 Fe Iron 55.847 28 Ni Nickel 58.70 27 Co Cobalt 58.9332 29 Cu Copper 63.546 30 Zn Zinc 65.38