Kisik

8
O
Skupina
16
Perioda
2
Blok
p
Protons
Electrons
Neutrons
8
8
8
General Properties
Vrstno število
8
Atomska teža
15,9994
Mass Number
16
Kategorija
Druge nekovine
Barva
Brezbarven
Radioactive
Ne
From the Greek word oxys, acid, and genes, forming
Kristalna struktura
Centrirana monoklinska
Zgodovina
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.
Electrons per shell
2, 6
Razporeditev elektronov
[He] 2s2 2p4
O
Green and red colors in the Aurora Borealis are caused by oxygen atoms
Physical Properties
Faza snovi
Plin
Gostota
0,001429 g/cm3
Tališče
54,36 K | -218,79 °C | -361,82 °F
Vrelišče
90,2 K | -182,95 °C | -297,31 °F
Talilna toplota
0,222 kJ/mol
Izparilna toplota
3,41 kJ/mol
Toplotna kapaciteta
0,918 J/g·K
Abundance in Earth's crust
46%
Abundance in Universe
1%
Vial
Zasluge za slike: Images-of-elements
Vial of glowing ultrapure oxygen
CAS Number
7782-44-7
PubChem CID Number
977
Atomic Properties
Atomski polmer
48 pm
Kovalentni polmer
66 pm
Elektronegativnost
3,44 (Paulingova lestvica)
Ionization Potential
13,6181 eV
Atomic Volume
14,0 cm3/mol
Toplotna prevodnost
0,0002674 W/cm·K
Oksidacijska stanja
-2, -1, 1, 2
Applications
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
Isotopes
Stable Isotopes
16O, 17O, 18O
Unstable Isotopes
12O, 13O, 14O, 15O, 19O, 20O, 21O, 22O, 23O, 24O, 25O, 26O, 27O, 28O