Osmi (Os)

chemical element with symbol Os and atomic number 76

Atomic Number	76
Atomic Weight	190.23
Rhif màs	192

Group	8
Period	6
Block	d

Proton	76 p⁺
Niwtron	116 n⁰
Electron	76 e^-

Nodwedd Ffisegol

Atomic Radius	130 pm 244 pm
molar volume	8.43 cm³/mol
covalent radius	129 pm 116 pm 109 pm 144 pm
Metallic Radius	126 pm 135 pm
ionic radius	63 pm 57.5 pm 49 pm 54.5 pm 52.5 pm 39 pm
Crystal Radius	77 pm 71.5 pm 63 pm 68.5 pm 66.5 pm 53 pm
Van der Waals radius	200 pm 216 pm 235 pm 312 pm
density	22.5872 g/cm³ 20,000 kg/m³

Nodwedd Gemegol

egni

proton affinity
electron affinity	1.1 eV/particle
ionization energy	8.43823 eV/particle 17 eV/particle 25 eV/particle 41 eV/particle 55 eV/particle 70.1 eV/particle 85.1 eV/particle 102.024 eV/particle 168.7 eV/particle 190 eV/particle 213 eV/particle 235 eV/particle 269 eV/particle 300 eV/particle 320 eV/particle 367 eV/particle 410 eV/particle 436 eV/particle 470 eV/particle 520 eV/particle 570 eV/particle 620 eV/particle 670 eV/particle 720 eV/particle 770 eV/particle 820 eV/particle 870 eV/particle 920 eV/particle 970 eV/particle 1,015 eV/particle 1,262 eV/particle 1,311 eV/particle 1,364 eV/particle 1,420 eV/particle 1,474 eV/particle 1,528 eV/particle 1,606 eV/particle 1,660 eV/particle 1,720 eV/particle 1,776 eV/particle 1,996 eV/particle 2,052 eV/particle 2,112 eV/particle 2,168 eV/particle 2,336 eV/particle 2,400 eV/particle 2,552 eV/particle 2,615.5 eV/particle 4,374 eV/particle 4,501 eV/particle 4,635 eV/particle 4,779 eV/particle 4,917 eV/particle 5,052 eV/particle 5,280 eV/particle 5,421 eV/particle 5,575 eV/particle 5,717 eV/particle 6,115 eV/particle 6,240 eV/particle 6,376 eV/particle 6,503 eV/particle 7,039 eV/particle 7,185 eV/particle 7,468 eV/particle 7,610 eV/particle 16,560 eV/particle 16,900 eV/particle 17,270 eV/particle 17,620 eV/particle 19,600 eV/particle 20,030 eV/particle 20,570 eV/particle 20,920.6 eV/particle 83,976.2 eV/particle 85,614.4 eV/particle

enthalpy of vaporization	738 kJ/mol
enthalpy of fusion	31.7 kJ/mol
standard enthalpy of formation	787 kJ/mol
Electron

plisgyn yr electron	2, 8, 18, 32, 14, 2

valence electron	2 ⓘ

trefn yr electronnau	[Xe] 4f¹⁴ 5d⁶ 6s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f¹⁴ 5d⁶ 6s²

Cyflwr ocsidiad	-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8
Electronegatifedd	9.78 eV/particle 0.2479845 2.2
Electrophilicity Index	1.5497236992588812 eV/particle
cyflwr sylfaenol mater

cyflwr mater	Solid
gaseous state of matter
Boiling Point	5,281.15 K
Melting Point	3,306.15 K
critical pressure
critical temperature
triple point
appearance
lliw	Slate Gray #ff1493 #266696 #266696
appearance	silvery, blue cast
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion	0.0000051 1/K
molar heat capacity	24.7 J/(mol K)
Specific Heat Capacity	0.13 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
dargludedd trydanol	12 MS/m
Gwrthedd	0.00000008000000000001 Ω*m
superconductivity	0.66 K
magnetism
type	paramagnetic
magnetic susceptibility (Mass)	0.0000000006 m³/Kg
magnetic susceptibility (Molar)	0.00000000011 m³/mol
magnetic susceptibility (Volume)	0.000014
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal Structure	Simple Hexagonal (HEX)
lattice constant	2.74 Å
Lattice Angles	π/2, π/2, 2 π/3
nodwedd mecanyddol deunyddiau
hardness	3,920 MPa 7 MPa
bulk modulus
shear modulus	222 GPa
Young's modulus
Poisson's ratio	0.25
speed of sound	4,940 m/s
classification
Category	Transition metals, Transition metals
CAS Group	VIIIA
IUPAC Group	VIII
Glawe Number	60
Mendeleev Number	61
Pettifor Number	62
Geochemical Class	noble metal
Goldschmidt classification	siderophile

other

Gas Basicity
polarizability	57 ± 3 a₀
C6 Dispersion Coefficient	584 a₀
allotrope
Neutron cross section	15
Neutron Mass Absorption	0.0023
quantum number	5D4
space group	194 (P63/mmc)

Isotopes of Osmium

Stable Isotopes	0
Unstable Isotopes	43
Natural Isotopes	7

¹⁶¹Os

Rhif màs	161
neutron number	85
Relative Atomic Mass	160.989054 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	640 ± 60 us
spin	7/2
nuclear quadrupole moment
dyddiad darganfod	2010
parity	-

decay mode	intensity
α (α emission)	100%

¹⁶²Os

Rhif màs	162
neutron number	86
Relative Atomic Mass	161.984434 ± 0.000322 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2.1 ± 0.1 ms
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1989
parity	+

decay mode	intensity
α (α emission)	100%

¹⁶³Os

Rhif màs	163
neutron number	87
Relative Atomic Mass	162.982462 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	5.7 ± 0.5 ms
spin	7/2
nuclear quadrupole moment
dyddiad darganfod	1981
parity	-

decay mode	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹⁶⁴Os

Rhif màs	164
neutron number	88
Relative Atomic Mass	163.978073158 ± 0.000160927 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	21 ± 1 ms
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1981
parity	+

decay mode	intensity
α (α emission)	96%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹⁶⁵Os

Rhif màs	165
neutron number	89
Relative Atomic Mass	164.976654 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	71 ± 3 ms
spin	7/2
nuclear quadrupole moment
dyddiad darganfod	1978
parity	-

decay mode	intensity
α (α emission)	90%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	10%

¹⁶⁶Os

Rhif màs	166
neutron number	90
Relative Atomic Mass	165.972698135 ± 0.000019287 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	213 ± 5 ms
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1977
parity	+

decay mode	intensity
α (α emission)	83%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	17%

¹⁶⁷Os

Rhif màs	167
neutron number	91
Relative Atomic Mass	166.971552304 ± 0.000086841 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	839 ± 5 ms
spin	7/2
nuclear quadrupole moment
dyddiad darganfod	1977
parity	-

decay mode	intensity
α (α emission)	51%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹⁶⁸Os

Rhif màs	168
neutron number	92
Relative Atomic Mass	167.96779905 ± 0.000010631 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2.1 ± 0.1 s
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1977
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	57%
α (α emission)	43%

¹⁶⁹Os

Rhif màs	169
neutron number	93
Relative Atomic Mass	168.967017521 ± 0.000027847 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	3.46 ± 0.11 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1972
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	86.3%
α (α emission)	13.7%

¹⁷⁰Os

Rhif màs	170
neutron number	94
Relative Atomic Mass	169.963579273 ± 0.000010476 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	7.37 ± 0.18 s
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1972
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	90.5%
α (α emission)	9.5%

¹⁷¹Os

Rhif màs	171
neutron number	95
Relative Atomic Mass	170.963180402 ± 0.000019589 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	8.3 ± 0.2 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1972
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)	1.8%

¹⁷²Os

Rhif màs	172
neutron number	96
Relative Atomic Mass	171.960017309 ± 0.000013704 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	19.2 ± 0.9 s
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1971
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	98.81%
α (α emission)	1.19%

¹⁷³Os

Rhif màs	173
neutron number	97
Relative Atomic Mass	172.959808387 ± 0.000016059 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	22.4 ± 0.9 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1971
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.6%
α (α emission)	0.4%

¹⁷⁴Os

Rhif màs	174
neutron number	98
Relative Atomic Mass	173.957063192 ± 0.000011008 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	44 ± 4 s
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1971
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	0.024%

¹⁷⁵Os

Rhif màs	175
neutron number	99
Relative Atomic Mass	174.956945126 ± 0.00001264 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.4 ± 0.1 m
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1972
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁶Os

Rhif màs	176
neutron number	100
Relative Atomic Mass	175.954770315 ± 0.000011754 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	3.6 ± 0.5 m
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1970
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁷Os

Rhif màs	177
neutron number	101
Relative Atomic Mass	176.954957902 ± 0.000015687 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	3 ± 0.2 m
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1970
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁸Os

Rhif màs	178
neutron number	102
Relative Atomic Mass	177.953253334 ± 0.000014634 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	5 ± 0.4 m
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1967
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁹Os

Rhif màs	179
neutron number	103
Relative Atomic Mass	178.953815985 ± 0.000016645 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	6.5 ± 0.3 m
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1968
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁸⁰Os

Rhif màs	180
neutron number	104
Relative Atomic Mass	179.952381665 ± 0.000016878 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	21.5 ± 0.4 m
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1967
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁸¹Os

Rhif màs	181
neutron number	105
Relative Atomic Mass	180.953247188 ± 0.000027201 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	105 ± 3 m
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1966
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁸²Os

Rhif màs	182
neutron number	106
Relative Atomic Mass	181.952110154 ± 0.000023344 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	21.84 ± 0.2 h
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1950
parity	+

decay mode	intensity
ϵ (electron capture)	100%

¹⁸³Os

Rhif màs	183
neutron number	107
Relative Atomic Mass	182.953125028 ± 0.000053428 Da
g-factor	0.17644444444444 ± 0.0031111111111111
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	13 ± 0.5 h
spin	9/2
nuclear quadrupole moment	3.1 ± 0.3
dyddiad darganfod	1950
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁸⁴Os

Rhif màs	184
neutron number	108
Relative Atomic Mass	183.952492919 ± 0.00000089 Da
g-factor	0
natural abundance	0.02 ± 0.02
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	11.2 ± 2.3 Ty
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1937
parity	+

decay mode	intensity
α (α emission)
2β⁺ (double β⁺ decay)

¹⁸⁵Os

Rhif màs	185
neutron number	109
Relative Atomic Mass	184.954045969 ± 0.000000893 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	92.95 ± 0.09 d
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1947
parity	-

decay mode	intensity
ϵ (electron capture)	100%

¹⁸⁶Os

Rhif màs	186
neutron number	110
Relative Atomic Mass	185.953837569 ± 0.000000816 Da
g-factor	0
natural abundance	1.59 ± 0.64
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2 ± 1.1 Py
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1931
parity	+

decay mode	intensity
α (α emission)	100%

¹⁸⁷Os

Rhif màs	187
neutron number	111
Relative Atomic Mass	186.955749569 ± 0.000000791 Da
g-factor
natural abundance	1.96 ± 0.17
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1931
parity	-

decay mode	intensity
α (α emission)

¹⁸⁸Os

Rhif màs	188
neutron number	112
Relative Atomic Mass	187.955837292 ± 0.000000788 Da
g-factor	0
natural abundance	13.24 ± 0.27
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1931
parity	+

decay mode	intensity
α (α emission)

¹⁸⁹Os

Rhif màs	189
neutron number	113
Relative Atomic Mass	188.958145949 ± 0.000000715 Da
g-factor
natural abundance	16.15 ± 0.23
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	3/2
nuclear quadrupole moment	0.86 ± 0.03
dyddiad darganfod	1931
parity	-

decay mode	intensity
α (α emission)

¹⁹⁰Os

Rhif màs	190
neutron number	114
Relative Atomic Mass	189.958445442 ± 0.000000697 Da
g-factor	0
natural abundance	26.26 ± 0.2
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1931
parity	+

decay mode	intensity
α (α emission)

¹⁹¹Os

Rhif màs	191
neutron number	115
Relative Atomic Mass	190.960928105 ± 0.000000707 Da
g-factor	0.21333333333333 ± 0.0066666666666667
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	14.99 ± 0.02 d
spin	9/2
nuclear quadrupole moment	2.53 ± 0.16
dyddiad darganfod	1940
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁹²Os

Rhif màs	192
neutron number	116
Relative Atomic Mass	191.961478765 ± 0.000002484 Da
g-factor	0
natural abundance	40.78 ± 0.32
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1931
parity	+

decay mode	intensity
2β⁻ (double β⁻ decay)
α (α emission)

¹⁹³Os

Rhif màs	193
neutron number	117
Relative Atomic Mass	192.964149637 ± 0.00000249 Da
g-factor	0.48666666666667 ± 0.0013333333333333
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	29.83 ± 0.018 h
spin	3/2
nuclear quadrupole moment
dyddiad darganfod	1940
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁹⁴Os

Rhif màs	194
neutron number	118
Relative Atomic Mass	193.965179407 ± 0.000002579 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	6 ± 0.2 y
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1951
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁹⁵Os

Rhif màs	195
neutron number	119
Relative Atomic Mass	194.968318 ± 0.00006 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	6.5 ± 1.1 m
spin	3/2
nuclear quadrupole moment
dyddiad darganfod	2004
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁹⁶Os

Rhif màs	196
neutron number	120
Relative Atomic Mass	195.969643261 ± 0.000043 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	34.9 ± 0.2 m
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1977
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁹⁷Os

Rhif màs	197
neutron number	121
Relative Atomic Mass	196.973076 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	93 ± 7 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	2003
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁹⁸Os

Rhif màs	198
neutron number	122
Relative Atomic Mass	197.974664 ± 0.000215 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	125 ± 28 s
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	2008
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁹⁹Os

Rhif màs	199
neutron number	123
Relative Atomic Mass	198.978239 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	6 ± 3 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	2008
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁰⁰Os

Rhif màs	200
neutron number	124
Relative Atomic Mass	199.980086 ± 0.000322 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	7 ± 4 s
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	2005
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁰¹Os

Rhif màs	201
neutron number	125
Relative Atomic Mass	200.984069 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	2009
parity	-

decay mode	intensity
β⁻ (β⁻ decay)

²⁰²Os

Rhif màs	202
neutron number	126
Relative Atomic Mass	201.986548 ± 0.000429 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	2009
parity	+

decay mode	intensity
β⁻ (β⁻ decay)

²⁰³Os

Rhif màs	203
neutron number	127
Relative Atomic Mass	202.992195 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	9/2
nuclear quadrupole moment
dyddiad darganfod	2012
parity	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

hanes

darganfyddwr neu ddyfeisiwr	Smithson Tenant
man darganfod	England
dyddiad darganfod	1804
geirdarddiad	Greek: osmê (odor).
ynganiad	OZ-mi-em (Saesneg)

source

Abundance
Abundance in Earth's crust	0.0015 mg/kg
natural abundance (cefnfor)
natural abundance (corff dynol)
natural abundance (Awyrfaen)	0.000066 %
natural abundance (Haul)	0.0000002 %
Abundance in Universe	0.0000003 %

Nuclear Screening Constants

1	s	1.4701
2	p	4.4502
2	s	19.8502
3	d	13.5253
3	p	21.7483
3	s	22.5727
4	d	37.142
4	f	38.8472
4	p	34.856
4	s	33.9048
5	d	58.003
5	p	53.09
5	s	50.905
6	s	65.677

Osmi on ChemicalAid

Australian Educational Vocabulary ID	scot/3552
Brockhaus Enzyklopädie online ID	osmium
CPV Supplementary	AA41
ChEBI ID	30687
ChemSpider ID	22379
Common Procurement Vocabulary	14792000
DSSTOX compound identifier	DTXCID7047643
DSSTox substance ID	DTXSID5064679
De Agostini ID	òsmio
Den Store Danske ID	osmium
ECHA Substance Infocard ID	100.028.285
French Vikidia ID	Osmium
GND	4172906-7
Great Russian Encyclopedia Online ID	2680588
InChI	InChI=1S/Os
InChIKey	SYQBFIAQOQZEGI-UHFFFAOYSA-N
Namuwiki ID	오스뮴
National Library of Israel J9U ID	987007553481505171
OmegaWiki Defined Meaning	340604
OpenAlex ID	C540285154
PubChem CID	23937
Rhif Cofrestru CAS	7440-04-2
RxNorm ID	1311130
Spanish Vikidia ID	Osmio
Store norske leksikon ID	osmium
UM-BBD compound ID	c0926
UNII	2E7M255OPY
USGS Thesaurus ID	1530
WordNet 3.1 Synset ID	14672085-n
ZVG number	7760
dynodwr Encyclopædia Britannica Online	science/osmium
dynodwr Encyclopædia Universalis	osmium
dynodwr Freebase	/m/025s6b_
dynodwr Gran Enciclopèdia Catalana	0128455
dynodwr HSDB	7329
dynodwr KBpedia	Osmium
dynodwr LCAuth	sh85095926
dynodwr Llyfrgell Genedlaethol Israel	000724669
dynodwr MeSH	D009992
dynodwr NDL	00568958
dynodwr PSH	5777
dynodwr Treccani	osmio
dynodwr Wolfram Language (endid)	Entity["Mineral", "Osmium"]

Osmi (Os)

Nodwedd Ffisegol

Nodwedd Gemegol

other

Isotopes of Osmium

161Os

162Os

163Os

164Os

165Os

166Os

167Os

168Os

169Os

170Os

171Os

172Os

173Os

174Os

175Os

176Os

177Os

178Os

179Os

180Os

181Os

182Os

183Os

184Os

185Os

186Os

187Os

188Os

189Os

190Os

191Os

192Os

193Os

194Os

195Os

196Os

197Os

198Os

199Os

200Os

201Os

202Os

203Os

hanes

source

Nuclear Screening Constants

¹⁶¹Os

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