At One Place

The periodic table

Every element, with its configuration and properties. This is the most stable dataset in existence — atomic numbers are definitional, and the physical constants move only with better measurement.

All 118 elements

Square brackets mark a mass number rather than a standard atomic weight — those elements have no stable isotope.
Z Symbol Element Mass Category Melting point
1 H Hydrogen 1.008 Nonmetal -259 °C
2 He Helium 4.0026 Noble gas -272 °C
3 Li Lithium 6.94 Alkali metal 181 °C
4 Be Beryllium 9.0122 Alkaline earth metal 1287 °C
5 B Boron 10.81 Metalloid 2075 °C
6 C Carbon 12.011 Nonmetal 3550 °C
7 N Nitrogen 14.007 Nonmetal -210 °C
8 O Oxygen 15.999 Nonmetal -219 °C
9 F Fluorine 18.998 Halogen -220 °C
10 Ne Neon 20.18 Noble gas -249 °C
11 Na Sodium 22.99 Alkali metal 98 °C
12 Mg Magnesium 24.305 Alkaline earth metal 650 °C
13 Al Aluminum 26.982 Post-transition metal 660 °C
14 Si Silicon 28.085 Metalloid 1414 °C
15 P Phosphorus 30.974 Nonmetal 44 °C
16 S Sulfur 32.06 Nonmetal 115 °C
17 Cl Chlorine 35.45 Halogen -101 °C
18 Ar Argon 39.95 Noble gas -189 °C
19 K Potassium 39.098 Alkali metal 63 °C
20 Ca Calcium 40.078 Alkaline earth metal 842 °C
21 Sc Scandium 44.956 Transition metal 1541 °C
22 Ti Titanium 47.867 Transition metal 1668 °C
23 V Vanadium 50.942 Transition metal 1910 °C
24 Cr Chromium 51.996 Transition metal 1907 °C
25 Mn Manganese 54.938 Transition metal 1246 °C
26 Fe Iron 55.845 Transition metal 1538 °C
27 Co Cobalt 58.933 Transition metal 1495 °C
28 Ni Nickel 58.693 Transition metal 1455 °C
29 Cu Copper 63.546 Transition metal 1085 °C
30 Zn Zinc 65.38 Transition metal 420 °C
31 Ga Gallium 69.723 Post-transition metal 30 °C
32 Ge Germanium 72.63 Metalloid 938 °C
33 As Arsenic 74.922 Metalloid 817 °C
34 Se Selenium 78.971 Nonmetal 221 °C
35 Br Bromine 79.904 Halogen -7 °C
36 Kr Krypton 83.798 Noble gas -157 °C
37 Rb Rubidium 85.468 Alkali metal 39 °C
38 Sr Strontium 87.62 Alkaline earth metal 777 °C
39 Y Yttrium 88.906 Transition metal 1522 °C
40 Zr Zirconium 91.222 Transition metal 1855 °C
41 Nb Niobium 92.906 Transition metal 2477 °C
42 Mo Molybdenum 95.95 Transition metal 2623 °C
43 Tc Technetium [97] Transition metal 2157 °C
44 Ru Ruthenium 101.07 Transition metal 2334 °C
45 Rh Rhodium 102.91 Transition metal 1964 °C
46 Pd Palladium 106.42 Transition metal 1555 °C
47 Ag Silver 107.87 Transition metal 962 °C
48 Cd Cadmium 112.41 Transition metal 321 °C
49 In Indium 114.82 Post-transition metal 157 °C
50 Sn Tin 118.71 Post-transition metal 232 °C
51 Sb Antimony 121.76 Metalloid 631 °C
52 Te Tellurium 127.6 Metalloid 450 °C
53 I Iodine 126.9 Halogen 114 °C
54 Xe Xenon 131.29 Noble gas -112 °C
55 Cs Cesium 132.91 Alkali metal 28 °C
56 Ba Barium 137.33 Alkaline earth metal 727 °C
57 La Lanthanum 138.91 Lanthanide 918 °C
58 Ce Cerium 140.12 Lanthanide 798 °C
59 Pr Praseodymium 140.91 Lanthanide 931 °C
60 Nd Neodymium 144.24 Lanthanide 1021 °C
61 Pm Promethium [145] Lanthanide 1042 °C
62 Sm Samarium 150.36 Lanthanide 1074 °C
63 Eu Europium 151.96 Lanthanide 822 °C
64 Gd Gadolinium 157.25 Lanthanide 1313 °C
65 Tb Terbium 158.93 Lanthanide 1356 °C
66 Dy Dysprosium 162.5 Lanthanide 1412 °C
67 Ho Holmium 164.93 Lanthanide 1474 °C
68 Er Erbium 167.26 Lanthanide 1529 °C
69 Tm Thulium 168.93 Lanthanide 1545 °C
70 Yb Ytterbium 173.05 Lanthanide 819 °C
71 Lu Lutetium 174.97 Lanthanide 1663 °C
72 Hf Hafnium 178.49 Transition metal 2233 °C
73 Ta Tantalum 180.95 Transition metal 3017 °C
74 W Tungsten 183.84 Transition metal 3422 °C
75 Re Rhenium 186.21 Transition metal 3186 °C
76 Os Osmium 190.23 Transition metal 3033 °C
77 Ir Iridium 192.22 Transition metal 2446 °C
78 Pt Platinum 195.08 Transition metal 1768 °C
79 Au Gold 196.97 Transition metal 1064 °C
80 Hg Mercury 200.59 Transition metal -39 °C
81 Tl Thallium 204.38 Post-transition metal 304 °C
82 Pb Lead 207.2 Post-transition metal 327 °C
83 Bi Bismuth 208.98 Post-transition metal 271 °C
84 Po Polonium [209] Metalloid 254 °C
85 At Astatine [210] Halogen —
86 Rn Radon [222] Noble gas -71 °C
87 Fr Francium [223] Alkali metal —
88 Ra Radium [226] Alkaline earth metal 700 °C
89 Ac Actinium [227] Actinide 1051 °C
90 Th Thorium 232.04 Actinide 1750 °C
91 Pa Protactinium 231.04 Actinide 1572 °C
92 U Uranium 238.03 Actinide 1135 °C
93 Np Neptunium [237] Actinide 644 °C
94 Pu Plutonium [244] Actinide 640 °C
95 Am Americium [243] Actinide 1176 °C
96 Cm Curium [247] Actinide 1345 °C
97 Bk Berkelium [247] Actinide 1050 °C
98 Cf Californium [251] Actinide 900 °C
99 Es Einsteinium [252] Actinide 860 °C
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] Transition metal —
110 Ds Darmstadtium [281] Transition metal —
111 Rg Roentgenium [282] Transition metal —
112 Cn Copernicium [285] Transition metal —
113 Nh Nihonium [286] Post-transition metal —
114 Fl Flerovium [289] Post-transition metal —
115 Mc Moscovium [290] Post-transition metal —
116 Lv Livermorium [293] Post-transition metal —
117 Ts Tennessine [294] Halogen —
118 Og Oganesson [294] Noble gas —

Every element

Common questions

Why do some elements have their mass in square brackets?
Because they have no stable isotope, so there is no natural abundance to average. The bracketed figure is the mass number of the longest-lived confirmed isotope instead.
Why are some properties missing for the heaviest elements?
Because no bulk sample has ever existed. For elements above about 99, only a handful of atoms have been produced, so published melting points and densities are calculations rather than measurements. They are omitted rather than shown as observed.
Why is chromium 4s¹ 3d⁵ rather than 4s² 3d⁴?
A half-filled d subshell is more stable than the alternative, so one electron moves from 4s to 3d. Copper does the same to complete its d shell, and there are nineteen such anomalies in the table.