Periodic table (18-column layout)
Group → 1 2 3   4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
  Alkali metal Alkaline earth metal                       Boron group Carbon group Pnictogen Chalcogen Halogen Noble gas
CAS: IA IIA IIIB   IVB VB VIB VIIB VIIIB IB IIB IIIA IVA VA VIA VIIA VIIIA
old IUPAC: IA IIA IIIA   IVA VA VIA VIIA VIII IB IIB IIIB IVB VB VIB VIIB 0
Period ↓ Period ↓ Hydrogen
  • [1.00781.0082]
  • short: 1.008
element name
atomic number
chemical symbol

 
  Helium
  • 4.002602(2)
  • short: 4.0026
2 Lithium
  • [6.9386.997]
  • short: 6.94
Beryllium
  • 9.0121831(5)
  • short: 9.0122
  Boron
  • [10.80610.821]
  • short: 10.81
Carbon
  • [12.00912.012]
  • short: 12.011
Nitrogen
  • [14.00614.008]
  • short: 14.007
Oxygen
  • [15.99916.000]
  • short: 15.999
Fluorine
  • 18.998403163(6)
  • short: 18.998
Neon
  • 20.1797(6)
  • short: 20.180
3 Sodium
  • 22.98976928(2)
  • short: 22.990
Magnesium
  • [24.30424.307]
  • short: 24.305
  Aluminium
  • 26.9815385(7)
  • short: 26.982
Silicon
  • [28.08428.086]
  • short: 28.085
Phosphorus
  • 30.973761998(5)
  • short: 30.974
Sulfur
  • [32.05932.076]
  • short: 32.06
Chlorine
  • [35.44635.457]
  • short: 35.45
Argon
  • 39.948(1)
  • short: 39.948
4 Potassium
  • 39.0983(1)
  • short: 39.098
Calcium
  • 40.078(4)
  • short: 40.078(4)
Scandium
  • 44.955908(5)
  • short: 44.956
  Titanium
  • 47.867(1)
  • short: 47.867
Vanadium
  • 50.9415(1)
  • short: 50.942
Chromium
  • 51.9961(6)
  • short: 51.996
Manganese
  • 54.938044(3)
  • short: 54.938
Iron
  • 55.845(2)
  • short: 55.845(2)
Cobalt
  • 58.933194(4)
  • short: 58.933
Nickel
  • 58.6934(4)
  • short: 58.693
Copper
  • 63.546(3)
  • short: 63.546(3)
Zinc
  • 65.38(2)
  • short: 65.38(2)
Gallium
  • 69.723(1)
  • short: 69.723
Germanium
  • 72.630(8)
  • short: 72.630(8)
Arsenic
  • 74.921595(6)
  • short: 74.922
Selenium
  • 78.971(8)
  • short: 78.971(8)
Bromine
  • [79.90179.907]
  • short: 79.904
Krypton
  • 83.798(2)
  • short: 83.798(2)
5 Rubidium
  • 85.4678(3)
  • short: 85.468
Strontium
  • 87.62(1)
  • short: 87.62
Yttrium
  • 88.90584(2)
  • short: 88.906
  Zirconium
  • 91.224(2)
  • short: 91.224(2)
Niobium
  • 92.90637(2)
  • short: 92.906
Molybdenum
  • 95.95(1)
  • short: 95.95
Technetium
[98]
Ruthenium
  • 101.07(2)
  • short: 101.07(2)
Rhodium
  • 102.90550(2)
  • short: 102.91
Palladium
  • 106.42(1)
  • short: 106.42
Silver
  • 107.8682(2)
  • short: 107.87
Cadmium
  • 112.414(4)
  • short: 112.41
Indium
  • 114.818(1)
  • short: 114.82
Tin
  • 118.710(7)
  • short: 118.71
Antimony
  • 121.760(1)
  • short: 121.76
Tellurium
  • 127.60(3)
  • short: 127.60(3)
Iodine
  • 126.90447(3)
  • short: 126.90
Xenon
  • 131.293(6)
  • short: 131.29
6 Caesium
  • 132.90545196(6)
  • short: 132.91
Barium
  • 137.327(7)
  • short: 137.33
Lanthanum
  • 138.90547(7)
  • short: 138.91

58–71
1 asterisk
Hafnium
  • 178.49(2)
  • short: 178.49(2)
Tantalum
  • 180.94788(2)
  • short: 180.95
Tungsten
74
W 
  • 183.84(1)
  • short: 183.84
Rhenium
  • 186.207(1)
  • short: 186.21
Osmium
  • 190.23(3)
  • short: 190.23(3)
Iridium
  • 192.217(3)
  • short: 192.22
Platinum
  • 195.084(9)
  • short: 195.08
Gold
  • 196.966569(5)
  • short: 196.97
Mercury
  • 200.592(3)
  • short: 200.59
Thallium
  • [204.38204.39]
  • short: 204.38
Lead
  • 207.2(1)
  • short: 207.2
Bismuth
  • 208.98040(1)
  • short: 208.98
Polonium
[209]
Astatine
[210]
Radon
[222]
7 Francium
[223]
Radium
[226]
Actinium
[227]

90–103
1 asterisk
Rutherfordium
104
Rf 
[267]
Dubnium
105
Db 
[268]
Seaborgium
106
Sg 
[269]
Bohrium
107
Bh 
[270]
Hassium
108
Hs 
[270]
Meitnerium
109
Mt 
[278]
Darmstadtium
110
Ds 
[281]
Roentgenium
111
Rg 
[282]
Copernicium
112
Cn 
[285]
Nihonium
113
Nh 
[286]
Flerovium
114
Fl 
[289]
Moscovium
115
Mc 
[290]
Livermorium
116
Lv 
[293]
Tennessine
117
Ts 
[294]
Oganesson
118
Og 
[294]

 
  1 asterisk Cerium
  • 140.116(1)
  • short: 140.12
Praseodymium
  • 140.90766(2)
  • short: 140.91
Neodymium
  • 144.242(3)
  • short: 144.24
Promethium
[145]
Samarium
  • 150.36(2)
  • short: 150.36(2)
Europium
  • 151.964(1)
  • short: 151.96
Gadolinium
  • 157.25(3)
  • short: 157.25(3)
Terbium
  • 158.92535(2)
  • short: 158.93
Dysprosium
  • 162.500(1)
  • short: 162.50
Holmium
  • 164.93033(2)
  • short: 164.93
Erbium
  • 167.259(3)
  • short: 167.26
Thulium
  • 168.93422(2)
  • short: 168.93
Ytterbium
  • 173.045(10)
  • short: 173.05
Lutetium
  • 174.9668(1)
  • short: 174.97
  1 asterisk Thorium
  • 232.0377(4)
  • short: 232.04
Protactinium
  • 231.03588(2)
  • short: 231.04
Uranium
  • 238.02891(3)
  • short: 238.03
Neptunium
[237]
Plutonium
[244]
Americium
[243]
Curium
[247]
Berkelium
[247]
Californium
[251]
Einsteinium
[252]
Fermium
100
Fm 
[257]
Mendelevium
101
Md 
[258]
Nobelium
102
No 
[259]
Lawrencium
103
Lr 
[266]
** Actinides 89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr
Atomic number colors show state at standard temperature and pressure (0 °C and 1 atm)
Solids Liquids Gases
Borders show natural occurrence
Primordial From decay Synthetic Undiscovered