Oksigen

8
O
Golongan
16
Periode
2
Blok
p
Proton
Elektron
Neutron
8
8
8
Sifat Umum
Nomor atom
8
Massa atom
15,9994
Nomor massa
16
Kategori
Nonlogam lainnya
Warna
Tak berwarna
Radioaktif
Tidak
Dari kata Yunani oxys, asam, dan genes, membentuk
Struktur kristal
Monoklinik Berpusat-dasar
Sejarah
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.
Elektron per kulit
2, 6
Konfigurasi elektron
[He] 2s2 2p4
O
Green and red colors in the Aurora Borealis are caused by oxygen atoms
Sifat Fisika
Fase
Gas
Kepadatan
0,001429 g/cm3
Titik lebur
54,36 K | -218,79 °C | -361,82 °F
Titik didih
90,2 K | -182,95 °C | -297,31 °F
Kalor peleburan
0,222 kJ/mol
Kalor penguapan
3,41 kJ/mol
Kapasitas kalor molar
0,918 J/g·K
Kelimpahan di kerak bumi
46%
Kelimpahan di alam semesta
1%
Vial
Kredit Gambar: Images-of-elements
Vial of glowing ultrapure oxygen
Nomor CAS
7782-44-7
PubChem CID Number
977
Sifat Atom
Jari-jari atom
48 pm
Jari-jari kovalen
66 pm
Elektronegativitas
3,44 (Skala Pauling)
Potensi Ionisasi
13,6181 eV
Volume atom
14,0 cm3/mol
Kondusivitas termal
0,0002674 W/cm·K
Bilangan oksidasi
-2, -1, 1, 2
Aplikasi
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
Isotop
Isotop stabil
16O, 17O, 18O
Isotop tidak stabil
12O, 13O, 14O, 15O, 19O, 20O, 21O, 22O, 23O, 24O, 25O, 26O, 27O, 28O