Krypton 36

Atomic No. Order:

Alphabetic Order:

Periodic Table

2, 8, 18,

He
2

Ne
10

Ar
18

Kr
36

Xe
54

Rn
86

Uuo
118

Uho
168

Buo
218

Krypton

Symbol

Atomic Number

36
Noble gas

Relative Atomic Mass
¹²C = 12.0000

83.798 (±2) [Since 2001]

Atomic Radius pm

110

First Ionisation Energy
kJ mol ^-1

1350.7

First Ionisation Energy (eV)

13.9996

Electronegativity

Density
kg m ^-3

2823 [s., m.p.]
2413 [l., b.p.]
3.7493 [g., 273 K]

Molar Volume cm ³

29.68 [116 K]

Thermal Conductivity
W m ^-1 K ^-1

0.00949 [300 K]

Melting Point K

116.6

Boiling Point K

120.85

Number of Isotopes

Isotope Atomic mass/u Mole fraction

78Kr 77.920 388(7) 0.003 55(3)
80Kr 79.916 379(4) 0.022 86(10)
82Kr 81.913 4850(28) 0.115 93(31)
83Kr 82.914 137(4) 0.115 00(19)
84Kr 83.911 508(3) 0.569 87(15)
86Kr 85.910 615(5) 0.172 79(41)

Inner + outer Shells

Inner + outer Orbitals

Filling Orbital

4p ⁶

Ground State Electron
Configuration

[Ar]

3d ¹⁰

4s ²

4p ⁶

= [Kr]

Ground State Electron
Configuration with
free Orbitals (n= 0)

0, 0, 0, 0

Ground State Electron
Configuration with
compressed Orbitals (n=24)

0, 0, 0, 24

Singularity

	s	p	d	f	g	h	i	j
1	2
2	2	6
3	2	6	10
4	2	6	10	14
5
6
7

Term Symbol

¹S ₀

Discovery

It was discovered in liquefied atmospheric air by the Scottish chemist William Ramsay and the English chemist Morris William Travers (London, England) in 1898. A wavelength in the atomic spectrum of 86Kr is the fundamental standard of length.

Name Derived From

The name derives from the Greek kryptos for "concealed" or "hidden".

APSIDIUM	Created:		2002-06-04		036.pdf
	Page update:		2004-06-20		036.pdf