+----------+------------+------------+---------------+------------+--------------+-------------+---------------+-------------------------+ | 0 | I. | II. | III. | IV. | V. | VI. | VII. | VIII. | +==========+============+============+===============+============+==============+=============+===============+=========================+ | | 1 Hydrogen | | | | | | | | | | H 1·008 | | | | | | | | +----------+------------+------------+---------------+------------+--------------+-------------+---------------+-------------------------+ | 2 Helium | 3 Lithium | 4 Beryllium| 5 Boron | 6 Carbon | 7 Nitrogen | 8 Oxygen | 9 Fluorine | | | He 4·00 | Li 6·94 | Be 9·1 | B 11·0 | C 12·0 | N 14·0 | O 16 | F 19·0 | | +----------+------------+------------+---------------+------------+--------------+-------------+---------------+------------------------+ | 10 Neon | 11 Sodium |12 Magnesium| 13 Aluminium | 14 Silicon | 5 Phosphorus | 16 Sulphur | 17 Chlorine | | | Ne 20·2 | Na 23·0 |Mg 24·3 | Al 27·1 | Si 28·3 | P 31·0 | S 32·1 | Cl 35·5 | | +----------+------------+------------+---------------+------------+--------------+-------------+---------------+------------------------+ | 18 Argon |19 Potassium| 20 Calcium | 21 Scandium | 22 Titanium| 23 Vanadium |24 Chromium | 25 Manganese | 26 Iron 27 Cobalt | | A 39·9 | K 39·1 | Ca 40·1 | Sc 44·1 | Ti 48·1 | V 51·0 | Cr 52·0 | Mn 54·9 | Fe 55·8 Co 59·0 | | | | | | | | | | 28 Nickel | | | | | | | | | | Ni 58.7 | +----------+------------+------------+---------------+------------+--------------+-------------+---------------+------------------------+ | | 29 Copper | 30 Zinc | 31 Gallium |32 Germanium| 33 Arsenic | 34 Selenium | 35 Bromine | | | | Cu 63·6 | Zn 65·4 | Ga 69·9 | Ge 72·5 | As 75·0 | Se 79·2 | Br 79·9 | | +----------+------------+------------+---------------+------------+--------------+-------------+---------------+------------------------+ |36 Krypton|37 Rubidium |38 Strontium| 39 Yttrium |40 Zirconium| 41 Niobium |42 Molybdenum| 43 -- |44 Ruthenium 45 Rhodium|