| Hydrogen |
|---|
1H |
|
| Panagway |
|---|
colorless gas
Purple glow in its plasma state
Spectral lines of hydrogen |
| Kinatibuk-ang mga kinaiya |
|---|
| Ngalan,simbolo,kaiphan | hydrogen, H, 1 |
|---|
| Paglitok | /ˈhaɪdrədʒən/[[Help:Pronunciation respelling key|Plantilya:Smallcaps all-drə-jən]][1] |
|---|
| Kategoriyang elemento | nonmetal |
|---|
| Group,period,block | 1, 1,s |
|---|
| Gibug-aton sa atomo | 1.008(1) |
|---|
| Kontorno sa elektron | 1s1
1 Electron shells of hydrogen (1) |
|---|
| History |
|---|
| Pagkadiskobre | Henry Cavendish[2][3] (1766) |
|---|
| Named by | Antoine Lavoisier[4] (1783) |
|---|
| Physical properties |
|---|
| Color | colorless |
|---|
| Phase | gas |
|---|
| Density | (0 °C, 101.325kPa)
0.08988 g/L |
|---|
| Liquiddensity atm.p. | 0.07 (0.0763 solid)[5] g·cm−3 |
|---|
| Liquiddensity atb.p. | 0.07099 g·cm−3 |
|---|
| Melting point | 14.01 K, -259.14 °C, -434.45 °F |
|---|
| Boiling point | 20.28 K, -252.87 °C, -423.17 °F |
|---|
| Triple point | 13.8033 K (-259°C), 7.042 kPa |
|---|
| Critical point | 32.97 K, 1.293 MPa |
|---|
| Heat of fusion | (H2) 0.117kJ·mol−1 |
|---|
| Heat of vaporization | (H2) 0.904 kJ·mol−1 |
|---|
| Molar heat capacity | (H2) 28.836 J·mol−1·K−1 |
|---|
| Vapor pressure |
|---|
| P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k | | at T (K) | | | | | 15 | 20 |
|
| Atomic properties |
|---|
| Oxidation states | 1, -1
(amphoteric oxide) |
|---|
| Electronegativity | 2.20 (Pauling scale) |
|---|
| Ionization energies | 1st: 1312.0 kJ·mol−1 |
|---|
| Covalent radius | 31±5 pm |
|---|
| Van der Waals radius | 120 pm |
|---|
| Miscellanea |
|---|
| Crystal structure | hexagonal |
|---|
| Magnetic ordering | diamagnetic[6] |
|---|
| Thermal conductivity | 0.1805 W·m−1·K−1 |
|---|
| Speed of sound | (gas, 27 °C) 1310m·s−1 |
|---|
| CAS registry number | 1333-74-0 |
|---|
| Most stable isotopes |
|---|
| Main article:Isotopes of hydrogen |
|
| ·r |
