Interactive Periodic Table of Elements
PW Periodic World
1
1
H
Hydrogen
1.0080
SeriesReactive nonmetal
Write-upHydrogen Wikipedia
State at 25 °C
gasWeight1.008 u
Energy levels1
Electronegativity,
2.20Melting point-259 °C
Boiling point-253 °C
Electron affinity72.769
Ionization,
1312Radius,
53 pm Hardness,
— Modulus,
— Density,
0 kg/m³ Conductivity,
0.1805 W/(m·K) Heat,
14,300 J/kgK Abundance,
75 % Discovered1766 AD
Year
CE
Temperature
°C
°F
K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Pnictogens
16
Chalcogens
17
Halogens
18
Noble gases
1
2
3
4
5
6
7
8
9
10