Periodic Table of Elements
An interactive reference for all chemical elements.
H
1
He
2
Li
3
Be
4
B
5
C
6
N
7
O
8
F
9
Ne
10
Na
11
Mg
12
Al
13
Si
14
P
15
S
16
Cl
17
Ar
18
K
19
Ca
20
Sc
21
Ti
22
V
23
Cr
24
Mn
25
Fe
26
Co
27
Ni
28
Cu
29
Zn
30
Ga
31
Ge
32
As
33
Se
34
Br
35
Kr
36
Rb
37
Sr
38
Y
39
Zr
40
Nb
41
Mo
42
Tc
43
Ru
44
Rh
45
Pd
46
Ag
47
Cd
48
In
49
Sn
50
Sb
51
Te
52
I
53
Xe
54
Cs
55
Ba
56
La
57
Ce
58
Pr
59
Nd
60
Pm
61
Sm
62
Eu
63
Gd
64
Tb
65
Dy
66
Ho
67
Er
68
Tm
69
Yb
70
Lu
71
Hf
72
Ta
73
W
74
Re
75
Os
76
Ir
77
Pt
78
Au
79
Hg
80
Tl
81
Pb
82
Bi
83
Po
84
At
85
Rn
86
Fr
87
Ra
88
Ac
89
Th
90
Pa
91
U
92
Np
93
Pu
94
Am
95
Cm
96
Bk
97
Cf
98
Es
99
Fm
100
Md
101
No
102
Lr
103
Rf
104
Db
105
Sg
106
Bh
107
Hs
108
Mt
109
Ds
110
Rg
111
Cn
112
Nh
113
Fl
114
Mc
115
Lv
116
Ts
117
Og
118
Uue
119
Select an element to view its details:
H
Hydrogen
He
Helium
Li
Lithium
Be
Beryllium
B
Boron
C
Carbon
N
Nitrogen
O
Oxygen
F
Fluorine
Ne
Neon
Na
Sodium
Mg
Magnesium
Al
Aluminium
Si
Silicon
P
Phosphorus
S
Sulfur
Cl
Chlorine
Ar
Argon
K
Potassium
Ca
Calcium
Sc
Scandium
Ti
Titanium
V
Vanadium
Cr
Chromium
Mn
Manganese
Fe
Iron
Co
Cobalt
Ni
Nickel
Cu
Copper
Zn
Zinc
Ga
Gallium
Ge
Germanium
As
Arsenic
Se
Selenium
Br
Bromine
Kr
Krypton
Rb
Rubidium
Sr
Strontium
Y
Yttrium
Zr
Zirconium
Nb
Niobium
Mo
Molybdenum
Tc
Technetium
Ru
Ruthenium
Rh
Rhodium
Pd
Palladium
Ag
Silver
Cd
Cadmium
In
Indium
Sn
Tin
Sb
Antimony
Te
Tellurium
I
Iodine
Xe
Xenon
Cs
Cesium
Ba
Barium
La
Lanthanum
Ce
Cerium
Pr
Praseodymium
Nd
Neodymium
Pm
Promethium
Sm
Samarium
Eu
Europium
Gd
Gadolinium
Tb
Terbium
Dy
Dysprosium
Ho
Holmium
Er
Erbium
Tm
Thulium
Yb
Ytterbium
Lu
Lutetium
Hf
Hafnium
Ta
Tantalum
W
Tungsten
Re
Rhenium
Os
Osmium
Ir
Iridium
Pt
Platinum
Au
Gold
Hg
Mercury
Tl
Thallium
Pb
Lead
Bi
Bismuth
Po
Polonium
At
Astatine
Rn
Radon
Fr
Francium
Ra
Radium
Ac
Actinium
Th
Thorium
Pa
Protactinium
U
Uranium
Np
Neptunium
Pu
Plutonium
Am
Americium
Cm
Curium
Bk
Berkelium
Cf
Californium
Es
Einsteinium
Fm
Fermium
Md
Mendelevium
No
Nobelium
Lr
Lawrencium
Rf
Rutherfordium
Db
Dubnium
Sg
Seaborgium
Bh
Bohrium
Hs
Hassium
Mt
Meitnerium
Ds
Darmstadtium
Rg
Roentgenium
Cn
Copernicium
Nh
Nihonium
Fl
Flerovium
Mc
Moscovium
Lv
Livermorium
Ts
Tennessine
Og
Oganesson
Uue
Ununennium
Hydrogen (H)
Atomic Number1
Atomic Mass1.008 u
PhaseGas
Categorydiatomic nonmetal
Electron Configuration
1s1
Summary
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.