Periodic Table

Searchable element table — symbol, atomic number, mass, category, and key properties.

Reference Reference Updated Apr 19, 2026
X Facebook LinkedIn Reddit Email
Reference

Common elements (1–56 plus select heavy metals).

Elements

Z Symbol Name Mass (u) Category
1 H Hydrogen 1.008 Nonmetal
2 He Helium 4.0026 Noble gas
3 Li Lithium 6.94 Alkali metal
4 Be Beryllium 9.0122 Alkaline earth
5 B Boron 10.81 Metalloid
6 C Carbon 12.011 Nonmetal
7 N Nitrogen 14.007 Nonmetal
8 O Oxygen 15.999 Nonmetal
9 F Fluorine 18.998 Halogen
10 Ne Neon 20.180 Noble gas
11 Na Sodium 22.990 Alkali metal
12 Mg Magnesium 24.305 Alkaline earth
13 Al Aluminum 26.982 Post-transition
14 Si Silicon 28.085 Metalloid
15 P Phosphorus 30.974 Nonmetal
16 S Sulfur 32.06 Nonmetal
17 Cl Chlorine 35.45 Halogen
18 Ar Argon 39.948 Noble gas
19 K Potassium 39.098 Alkali metal
20 Ca Calcium 40.078 Alkaline earth
21 Sc Scandium 44.956 Transition
22 Ti Titanium 47.867 Transition
23 V Vanadium 50.942 Transition
24 Cr Chromium 51.996 Transition
25 Mn Manganese 54.938 Transition
26 Fe Iron 55.845 Transition
27 Co Cobalt 58.933 Transition
28 Ni Nickel 58.693 Transition
29 Cu Copper 63.546 Transition
30 Zn Zinc 65.38 Transition
31 Ga Gallium 69.723 Post-transition
32 Ge Germanium 72.63 Metalloid
33 As Arsenic 74.922 Metalloid
34 Se Selenium 78.971 Nonmetal
35 Br Bromine 79.904 Halogen
36 Kr Krypton 83.798 Noble gas
37 Rb Rubidium 85.468 Alkali metal
38 Sr Strontium 87.62 Alkaline earth
39 Y Yttrium 88.906 Transition
40 Zr Zirconium 91.224 Transition
41 Nb Niobium 92.906 Transition
42 Mo Molybdenum 95.95 Transition
43 Tc Technetium (98) Transition
44 Ru Ruthenium 101.07 Transition
45 Rh Rhodium 102.91 Transition
46 Pd Palladium 106.42 Transition
47 Ag Silver 107.87 Transition
48 Cd Cadmium 112.41 Transition
49 In Indium 114.82 Post-transition
50 Sn Tin 118.71 Post-transition
51 Sb Antimony 121.76 Metalloid
52 Te Tellurium 127.60 Metalloid
53 I Iodine 126.90 Halogen
54 Xe Xenon 131.29 Noble gas
55 Cs Cesium 132.91 Alkali metal
56 Ba Barium 137.33 Alkaline earth
74 W Tungsten 183.84 Transition
78 Pt Platinum 195.08 Transition
79 Au Gold 196.97 Transition
80 Hg Mercury 200.59 Transition
82 Pb Lead 207.2 Post-transition
86 Rn Radon (222) Noble gas
92 U Uranium 238.03 Actinide
94 Pu Plutonium (244) Actinide

Last updated: