Krypton

Kemiallinen merkki: Kr
Järjestysluku: 36
Kategoria: jalokaasut
Ryhmä: 18
Jakso: 4
Lohko: p
Moolimassa: 83,798 g/mol
Elektronia kuorilla: 2, 8, 18, 8
CAS-numero: 7439-90-9
Olomuoto: kaasu
Tiheys: 3,7494 g/l (0 °C, 101,325 kPa)
Sulamispiste: 115,79 K (-157,36 °C, -251,25 °F)
Kiehumispiste: 119,93 K (-153,22 °C, -244,12 °F)
Kiderakenne: cubic face centered
Hapetusluvut: 4, 2
Elektronegatiivisuus: 3,00 (Pauling-asteikko)
Nimen alkuperä: kryptos
Nimen tarkoitus: a Greek word which means 'hidden' because it's found in trace amounts in the Earth's atmosphere
Faktoja:
- a colorless, odorless and tasteless noble gas
- is isolated by fractionally distilling liquified air
- is often used with other rare gases in fluorescent lamps
- has a brilliant green and orange spectral signature
- its concentration in the atmosphere is about 1 ppm
- little is known about whether krypton is dangerous, but it is treated as a non-toxic asphyxiant
- costs 100 times as much as argon