Element directory

All 118 chemical elements

Browse every element by atomic number. All 118 elements now have source-reviewed teaching guides with interactive science, evidence context, geography, FAQs and downloadable study material.

Deep teaching guides

Completed element guides

Discovery index

Elements 1–118

Every element in this 1–118 index now opens its completed teaching guide. The interactive periodic table remains available for visual comparison and trend exploration.

1 H Hydrogen Guide 2 He Helium Guide 3 Li Lithium Guide 4 Be Beryllium Guide 5 B Boron Guide 6 C Carbon Guide 7 N Nitrogen Guide 8 O Oxygen Guide 9 F Fluorine Guide 10 Ne Neon Guide 11 Na Sodium Guide 12 Mg Magnesium Guide 13 Al Aluminium Guide 14 Si Silicon Guide 15 P Phosphorus Guide 16 S Sulfur Guide 17 Cl Chlorine Guide 18 Ar Argon Guide 19 K Potassium Guide 20 Ca Calcium Guide 21 Sc Scandium Guide 22 Ti Titanium Guide 23 V Vanadium Guide 24 Cr Chromium Guide 25 Mn Manganese Guide 26 Fe Iron Guide 27 Co Cobalt Guide 28 Ni Nickel Guide 29 Cu Copper Guide 30 Zn Zinc Guide 31 Ga Gallium Guide 32 Ge Germanium Guide 33 As Arsenic Guide 34 Se Selenium Guide 35 Br Bromine Guide 36 Kr Krypton Guide 37 Rb Rubidium Guide 38 Sr Strontium Guide 39 Y Yttrium Guide 40 Zr Zirconium Guide 41 Nb Niobium Guide 42 Mo Molybdenum Guide 43 Tc Technetium Guide 44 Ru Ruthenium Guide 45 Rh Rhodium Guide 46 Pd Palladium Guide 47 Ag Silver Guide 48 Cd Cadmium Guide 49 In Indium Guide 50 Sn Tin Guide 51 Sb Antimony Guide 52 Te Tellurium Guide 53 I Iodine Guide 54 Xe Xenon Guide 55 Cs Cesium Guide 56 Ba Barium Guide 57 La Lanthanum Guide 58 Ce Cerium Guide 59 Pr Praseodymium Guide 60 Nd Neodymium Guide 61 Pm Promethium Guide 62 Sm Samarium Guide 63 Eu Europium Guide 64 Gd Gadolinium Guide 65 Tb Terbium Guide 66 Dy Dysprosium Guide 67 Ho Holmium Guide 68 Er Erbium Guide 69 Tm Thulium Guide 70 Yb Ytterbium Guide 71 Lu Lutetium Guide 72 Hf Hafnium Guide 73 Ta Tantalum Guide 74 W Tungsten Guide 75 Re Rhenium Guide 76 Os Osmium Guide 77 Ir Iridium Guide 78 Pt Platinum Guide 79 Au Gold Guide 80 Hg Mercury Guide 81 Tl Thallium Guide 82 Pb Lead Guide 83 Bi Bismuth Guide 84 Po Polonium Guide 85 At Astatine Guide 86 Rn Radon Guide 87 Fr Francium Guide 88 Ra Radium Guide 89 Ac Actinium Guide 90 Th Thorium Guide 91 Pa Protactinium Guide 92 U Uranium Guide 93 Np Neptunium Guide 94 Pu Plutonium Guide 95 Am Americium Guide 96 Cm Curium Guide 97 Bk Berkelium Guide 98 Cf Californium Guide 99 Es Einsteinium Guide 100 Fm Fermium Guide 101 Md Mendelevium Guide 102 No Nobelium Guide 103 Lr Lawrencium Guide 104 Rf Rutherfordium Guide 105 Db Dubnium Guide 106 Sg Seaborgium Guide 107 Bh Bohrium Guide 108 Hs Hassium Guide 109 Mt Meitnerium Guide 110 Ds Darmstadtium Guide 111 Rg Roentgenium Guide 112 Cn Copernicium Guide 113 Nh Nihonium Guide 114 Fl Flerovium Guide 115 Mc Moscovium Guide 116 Lv Livermorium Guide 117 Ts Tennessine Guide 118 Og Oganesson Guide

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