Data lookups

Chemical elements

All 118 elements with symbol, atomic number and basic properties.

All lookups

118 entries.

Atomic no.SymbolNameAtomic weightCategory
1 H Hydrogen 1.008 Reactive non-metal
2 He Helium 4.0026 Noble gas
3 Li Lithium 6.94 Alkali metal
4 Be Beryllium 9.0122 Alkaline earth metal
5 B Boron 10.81 Metalloid
6 C Carbon 12.011 Reactive non-metal
7 N Nitrogen 14.007 Reactive non-metal
8 O Oxygen 15.999 Reactive non-metal
9 F Fluorine 18.998 Reactive non-metal
10 Ne Neon 20.180 Noble gas
11 Na Sodium 22.990 Alkali metal
12 Mg Magnesium 24.305 Alkaline earth metal
13 Al Aluminium 26.982 Post-transition metal
14 Si Silicon 28.085 Metalloid
15 P Phosphorus 30.974 Reactive non-metal
16 S Sulfur 32.06 Reactive non-metal
17 Cl Chlorine 35.45 Reactive non-metal
18 Ar Argon 39.95 Noble gas
19 K Potassium 39.098 Alkali metal
20 Ca Calcium 40.078 Alkaline earth metal
21 Sc Scandium 44.956 Transition metal
22 Ti Titanium 47.867 Transition metal
23 V Vanadium 50.942 Transition metal
24 Cr Chromium 51.996 Transition metal
25 Mn Manganese 54.938 Transition metal
26 Fe Iron 55.845 Transition metal
27 Co Cobalt 58.933 Transition metal
28 Ni Nickel 58.693 Transition metal
29 Cu Copper 63.546 Transition metal
30 Zn Zinc 65.38 Transition metal
31 Ga Gallium 69.723 Post-transition metal
32 Ge Germanium 72.630 Metalloid
33 As Arsenic 74.922 Metalloid
34 Se Selenium 78.971 Reactive non-metal
35 Br Bromine 79.904 Reactive non-metal
36 Kr Krypton 83.798 Noble gas
37 Rb Rubidium 85.468 Alkali metal
38 Sr Strontium 87.62 Alkaline earth metal
39 Y Yttrium 88.906 Transition metal
40 Zr Zirconium 91.224 Transition metal
41 Nb Niobium 92.906 Transition metal
42 Mo Molybdenum 95.95 Transition metal
43 Tc Technetium [98] Transition metal
44 Ru Ruthenium 101.07 Transition metal
45 Rh Rhodium 102.91 Transition metal
46 Pd Palladium 106.42 Transition metal
47 Ag Silver 107.87 Transition metal
48 Cd Cadmium 112.41 Transition metal
49 In Indium 114.82 Post-transition metal
50 Sn Tin 118.71 Post-transition metal
51 Sb Antimony 121.76 Metalloid
52 Te Tellurium 127.60 Metalloid
53 I Iodine 126.90 Reactive non-metal
54 Xe Xenon 131.29 Noble gas
55 Cs Caesium 132.91 Alkali metal
56 Ba Barium 137.33 Alkaline earth metal
57 La Lanthanum 138.91 Lanthanide
58 Ce Cerium 140.12 Lanthanide
59 Pr Praseodymium 140.91 Lanthanide
60 Nd Neodymium 144.24 Lanthanide
61 Pm Promethium [145] Lanthanide
62 Sm Samarium 150.36 Lanthanide
63 Eu Europium 151.96 Lanthanide
64 Gd Gadolinium 157.25 Lanthanide
65 Tb Terbium 158.93 Lanthanide
66 Dy Dysprosium 162.50 Lanthanide
67 Ho Holmium 164.93 Lanthanide
68 Er Erbium 167.26 Lanthanide
69 Tm Thulium 168.93 Lanthanide
70 Yb Ytterbium 173.05 Lanthanide
71 Lu Lutetium 174.97 Lanthanide
72 Hf Hafnium 178.49 Transition metal
73 Ta Tantalum 180.95 Transition metal
74 W Tungsten 183.84 Transition metal
75 Re Rhenium 186.21 Transition metal
76 Os Osmium 190.23 Transition metal
77 Ir Iridium 192.22 Transition metal
78 Pt Platinum 195.08 Transition metal
79 Au Gold 196.97 Transition metal
80 Hg Mercury 200.59 Transition metal
81 Tl Thallium 204.38 Post-transition metal
82 Pb Lead 207.2 Post-transition metal
83 Bi Bismuth 208.98 Post-transition metal
84 Po Polonium [209] Post-transition metal
85 At Astatine [210] Metalloid
86 Rn Radon [222] Noble gas
87 Fr Francium [223] Alkali metal
88 Ra Radium [226] Alkaline earth metal
89 Ac Actinium [227] Actinide
90 Th Thorium 232.04 Actinide
91 Pa Protactinium 231.04 Actinide
92 U Uranium 238.03 Actinide
93 Np Neptunium [237] Actinide
94 Pu Plutonium [244] Actinide
95 Am Americium [243] Actinide
96 Cm Curium [247] Actinide
97 Bk Berkelium [247] Actinide
98 Cf Californium [251] Actinide
99 Es Einsteinium [252] Actinide
100 Fm Fermium [257] Actinide
101 Md Mendelevium [258] Actinide
102 No Nobelium [259] Actinide
103 Lr Lawrencium [266] Actinide
104 Rf Rutherfordium [267] Transition metal
105 Db Dubnium [268] Transition metal
106 Sg Seaborgium [269] Transition metal
107 Bh Bohrium [270] Transition metal
108 Hs Hassium [269] Transition metal
109 Mt Meitnerium [278] Unknown properties
110 Ds Darmstadtium [281] Unknown properties
111 Rg Roentgenium [282] Unknown properties
112 Cn Copernicium [285] Transition metal
113 Nh Nihonium [286] Unknown properties
114 Fl Flerovium [289] Unknown properties
115 Mc Moscovium [290] Unknown properties
116 Lv Livermorium [293] Unknown properties
117 Ts Tennessine [294] Unknown properties
118 Og Oganesson [294] Unknown properties
All 118 confirmed elements. Weights in [brackets] are the mass number of the most stable known isotope, for elements with no stable form. Everything from 95 upward is synthetic.