Here is a list of the first fifty elements, along with their symbols and typical valence (oxidation states):
| Atomic Number | Element | Symbol | Valence | |---------------|--------------|--------|----------------------| | 1 | Hydrogen | H | +1 | | 2 | Helium | He | 0 | | 3 | Lithium | Li | +1 | | 4 | Beryllium | Be | +2 | | 5 | Boron | B | +3 | | 6 | Carbon | C | +4, -4 | | 7 | Nitrogen | N | -3, +3, +5 | | 8 | Oxygen | O | -2 | | 9 | Fluorine | F | -1 | | 10 | Neon | Ne | 0 | | 11 | Sodium | Na | +1 | | 12 | Magnesium | Mg | +2 | | 13 | Aluminum | Al | +3 | | 14 | Silicon | Si | +4, -4 | | 15 | Phosphorus | P | -3, +3, +5 | | 16 | Sulfur | S | -2, +4, +6 | | 17 | Chlorine | Cl | -1, +1, +3, +5, +7 | | 18 | Argon | Ar | 0 | | 19 | Potassium | K | +1 | | 20 | Calcium | Ca | +2 | | 21 | Scandium | Sc | +3 | | 22 | Titanium | Ti | +2, +3, +4 | | 23 | Vanadium | V | +2, +3, +4, +5 | | 24 | Chromium | Cr | +2, +3, +6 | | 25 | Manganese | Mn | +2, +4, +7 | | 26 | Iron | Fe | +2, +3 | | 27 | Cobalt | Co | +2, +3 | | 28 | Nickel | Ni | +2, +3 | | 29 | Copper | Cu | +1, +2 | | 30 | Zinc | Zn | +2 | | 31 | Gallium | Ga | +3 | | 32 | Germanium | Ge | +2, +4 | | 33 | Arsenic | As | -3, +3, +5 | | 34 | Selenium | Se | -2, +4, +6 | | 35 | Bromine | Br | -1, +1, +3, +5 | | 36 | Krypton | Kr | 0 | | 37 | Rubidium | Rb | +1 | | 38 | Strontium | Sr | +2 | | 39 | Yttrium | Y | +3 | | 40 | Zirconium | Zr | +4 | | 41 | Niobium | Nb | +3, +5 | | 42 | Molybdenum | Mo | +2, +3, +4, +5, +6 | | 43 | Technetium | Tc | +7 | | 44 | Ruthenium | Ru | +2, +3, +4 | | 45 | Rhodium | Rh | +1, +3 | | 46 | Palladium | Pd | +2, +4 | | 47 | Silver | Ag | +1 | | 48 | Cadmium | Cd | +2 | | 49 | Indium | In | +3 | | 50 | Tin | Sn | +2, +4 |
Please note that the valence states can vary based on the chemical environment of the elements. The most common oxidation states are listed, but other states may exist for some elements.