Syre

8
O
Grupp
16
Period
2
Block
p
Protoner
Elektroner
Neutroner
8
8
8
Generella Egenskaper
Atomnummer
8
Atommassa
15,9994
Masstal
16
Kategori
Icke-metaller
Färg
Färglös
Radioaktiv
Nej
From the Greek word oxys, acid, and genes, forming
Kristallstruktur
Bascentrerat monoklint
Historia
Carl Wilhelm Scheele obtained oxygen by heating mercuric oxide and nitrates in 1771, but did not publish his findings until 1777.

Joseph Priestley also prepared this new air by 1774.

The name oxygen was coined in 1777 by Antoine Lavoisier, whose experiments with oxygen helped to discredit the then-popular phlogiston theory of combustion and corrosion.
Elektroner per skal
2, 6
Elektronkonfiguration
[He] 2s2 2p4
O
Green and red colors in the Aurora Borealis are caused by oxygen atoms
Fysikaliska Egenskaper
Aggregationstillstånd
Gasformig
Densitet
0,001429 g/cm3
Smältpunkt
54,36 K | -218,79 °C | -361,82 °F
Kokpunkt
90,2 K | -182,95 °C | -297,31 °F
Smältvärme
0,222 kJ/mol
Ångbildningsvärme
3,41 kJ/mol
Specifik värmekapacitet
0,918 J/g·K
Abundance in Earth's crust
46%
Abundance in Universe
1%
Vial
Bildkrediter: Images-of-elements
Vial of glowing ultrapure oxygen
CAS Number
7782-44-7
PubChem CID Number
977
Atomära Egenskaper
Atomradie
48 pm
Kovalent radie
66 pm
Elektronegativitet
3,44 (Paulingskalan)
Jonisationspotential
13,6181 eV
Molvolym
14,0 cm3/mol
Värmeledningsförmåga
0,0002674 W/cm·K
Oxidationstillstånd
-2, -1, 1, 2
Användningsområden
Pure oxygen is frequently used to help breathing in patients with respiratory ailments.

Oxygen is used in oxyacetylene welding, as an oxidant for rocket fuel, and in methanol and ethylene oxide production.

It is also used in the production of steel, plastics and textiles.

Plants and animals rely on oxygen for respiration.
Oxygen gas can be toxic at elevated partial pressures, leading to convulsions and other health problems
Isotoper
Stabila isotoper
16O, 17O, 18O
Instabila isotoper
12O, 13O, 14O, 15O, 19O, 20O, 21O, 22O, 23O, 24O, 25O, 26O, 27O, 28O