Krypton Element (Periodic Table)

Krypton

Krypton (Kr) is a chemical element of the periodic table, located in the group 18 and the period 4, and is having the atomic number 36. It is a colorless, odorless, tasteless gas, whose name comes from the Greek word “kryptos”, which means hidden. It is a member of the noble gas group.

group
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
period
1
1
H
2
He
2
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
3
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
4
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
5
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
6
55
Cs
56
Ba
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
7
87
Fr
88
Ra
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr
– p block

FAQs on Krypton Element

Krypton
‣ What does krypton look like?

Appearance: colorless gas, exhibiting a whitish glow in an electric field
‣ When was krypton discovered and by whom?

Discovery and first isolation: William Ramsay and Morris Travers (1898)
‣ Where is krypton found on the periodic table?

Krypton Periodic Table

Location: Krypton is found in the eighteenth column of the periodic table below the argon element.
‣ What is krypton’s atomic number?

Atomic number (Z): 36
‣ What is the symbol for krypton?

Symbol: Kr
‣ What is the atomic weight of krypton?

Standard atomic weight: 83.798
‣ What block does krypton belong to?

Block: p-block
‣ What group is krypton in on the periodic table?

Group: 18 (noble gases)
‣ Which period is krypton in on the periodic table?

Period: 4
Krypton covalent radius: 116±4 pm
Krypton Van der Waals radius: 202 pm
‣ What is krypton’s melting point?

Melting point: 115.78 K (-157.37 °C, -251.27 °F)
‣ What is the boiling point of krypton?

Boiling point: 119.93 K (-153.415 °C, -244.147 °F)
Krypton critical point: 209.48 K, 5.525 MPa
Krypton triple point: 115.775 K, 73.53 kPa
‣ How many electron shells does krypton have?

Electrons per shell: 2, 8, 18, 8
‣ What is the condensed electron configuration of krypton?

Electron configuration: [Ar] 3d10 4s2 4p6
‣ What is the ionization energy of krypton?

Ionization energies:
1st: 1350.8 kJ/mol
2nd: 2350.4 kJ/mol
3rd: 3565 kJ/mol
‣ What phase is krypton normally found in?

Phase (at r.t): gas
‣ What is krypton’s density?

Density (at STP): 3.749 g/L
when liquid (at b.p): 2.413 g/cm3
Krypton magnetic ordering: diamagnetic
Krypton natural occurrence: primordial
Krypton oxidation state: 0, +2
‣ What is krypton electronegativity?

Electronegativity: Pauling scale: 3.00
Krypton heat of fusion: 1.64 kJ/mol
Krypton heat of vaporization: 9.08 kJ/mol
Krypton molar heat capacity: 20.95 J/(mol K)
Krypton molar magnetic susceptibility: -28.8 × 10-6 cm3/mol (298 K)
Speed of sound in krypton:
(gas, 20 °C) 221 m/s
(liquid) 1120 m/s
‣ What is the crystal structure of krypton?

Crystal structure: face-centered cubic (fcc)
Thermal conductivity of krypton: 9.43 × 10-3 W/(m.K)
Krypton CAS number: 7439-90-9

‣ Krypton vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)5965748499120

‣ How many isotopes does krypton have?

Main isotopes of krypton
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
78Kr0.36 %9.2 × 1021 yεε78Se
79Krsyn35 hε
β+
γ
79Br
79Br
80Kr2.29 %2.3 × 105 ystable
81Krtraceε
γ
81Br
82Kr11.59 %stable
83Kr11.50 %stable
84Kr56.99 %stable
85Krsyn11 yβ85Rb
86Kr17.28 %stable

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