Krypton

Krypton
36Kr
Ar ↑ Kr ↓ Xe Tábìlì ìdásìkò bromine ← krypton → rubidium
Ìhànsójú
colorless gas with whitish emission Spectral lines of Krypton
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà	krypton, Kr, 36
Ẹ̀ka ẹ́límẹ̀nti	noble gases
Ẹgbẹ́, àsìkò, àdìpò	18, 4, p
Ìwúwo átọ́mù	83.798
Ìtòléra ẹ̀lẹ́ktrónì	[Ar] 3d10 4s2 4p6 2, 8, 18, 8
Physical properties
Phase	gas
Density	(0 °C, 101.325 kPa) 3.749 g/L
Melting point	115.79 K, -157.36 °C, -251.25 °F
Boiling point	119.93 K, -153.22 °C, -244.12 °F
Triple point	115.775 K (-157°C), 73.2 kPa
Critical point	209.41 K, 5.50 MPa
Heat of fusion	1.64 kJ·mol−1
Heat of vaporization	9.08 kJ·mol−1
Molar heat capacity	20.786 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 59 65 74 120
Atomic properties
Oxidation states	2
Electronegativity	3.00 (Pauling scale)
Ionization energies	1st: 1350.8 kJ·mol−1
	2nd: 2350.4 kJ·mol−1
	3rd: 3565 kJ·mol−1
Covalent radius	116±4 pm
Van der Waals radius	202 pm
Miscellanea
Crystal structure	cubic face-centered
Magnetic ordering	diamagnetic
Thermal conductivity	9.43x10-3  W·m−1·K−1
Speed of sound	(gas, 23 °C) 220, (liquid) 1120 m·s−1
CAS registry number	7439-90-9
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù krypton
iso NA half-life DM DE (MeV) DP 78Kr 0.35% 78Kr is stable with 42 neutrons 79Kr syn 35.04 h ε - 79Br β+ 0.604 79Br γ 0.26, 0.39, 0.60 - 80Kr 2.25% 80Kr is stable with 44 neutrons 81Kr trace 2.29×105 y ε - 81Br γ 0.281 - 82Kr 11.6% 82Kr is stable with 46 neutrons 83Kr 11.5% 83Kr is stable with 47 neutrons 84Kr 57% 84Kr is stable with 48 neutrons 85Kr syn 10.756 y β− 0.687 85Rb 86Kr 17.3% 86Kr is stable with 50 neutrons