O
Oxygen
Element 8 · 15.999 u
Oxygen is the third most abundant element in the universe and essential for respiration in most life forms.
Fisiese eienskappe
| Atomic Mass | 15.999 u |
| Density | 0.001429 g/cm³ |
| Smelt punt: | 54.36 K |
| Boiling Point | 90.2 K |
| Appearance | Colorless gas, pale blue liquid |
| Toestand by kamerkomp | Gas |
Chemical Properties
| Electronegativity | 3.44 (TrinidadCity name (optional, probably does not need a translation)) |
| 1st Ionization Energy | 1313.9 kJ/mol |
| Electron Affinity | 140.98 kJ/mol |
| Oxidation States | -2, -1, +1, +2 |
Atomic Properties
| Electron Configuration | [He] 2s2 2p4 |
| Atomic Radius | 48.0 pm |
| Covalent Radius | 66.0 pm |
| Atomic radius: | 152.0 pm |
Discovery
| Discovered By | Carl Wilhelm Scheele |
| Discovery Year | 1771 |
| Location | Uppsala, Sweden |
| Genoemde Na | Greek 'oxy genes' meaning acid-forming |
About Oxygen
Oxygen is a highly reactive nonmetal and the most abundant element in Earth's crust. It readily forms oxides with most elements. Oxygen is essential for cellular respiration and combustion. The ozone layer protects life on Earth from ultraviolet radiation.
Gebruiks & Programme
Steelmaking, medical breathing gas, welding and cutting, water treatment, rocket propellant, and chemical manufacturing.
Fun Fact
Oxygen is paramagnetic -- liquid oxygen is pale blue and can be suspended between the poles of a strong magnet.
Isotopes
| Definieer Molekulêr Gewigte | Abundance | Half-Life | Stabiel |
| 16 | 0.99757% | - | Ja |
| 17 | 0.00038% | - | Ja |
| 18 | 0.00205% | - | Ja |
Electron Configuration
[He] 2s2 2p4