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Osmyo .
Osmium
76 Os
Panagway
silvery, blue cast
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan
osmium, Os, 76
Paglitok
[[Help:Pronunciation respelling key|Plantilya:Smallcaps all -mee-əm ]]
Kategoriyang elemento
puthaw nga transisyon
Group, period, block
8, 6, d
Gibug-aton sa atomo
190.23
Kontorno sa elektron
[Xe ] 4f14 5d6 6s2 2, 8, 18, 32, 14, 2
Electron shells of osmium (2, 8, 18, 32, 14, 2)
History
Pagkadiskobre
Smithson Tennant (1803)
First isolation
Smithson Tennant (1803)
Physical properties
Phase
magahi
Density (near r.t.)
22.59 g·cm−3
Liquid density at m.p.
20 g·cm−3
Melting point
3306 K , 3033 °C, 5491 °F
Boiling point
5285 K, 5012 °C, 9054 °F
Heat of fusion
57.85 kJ·mol−1
Heat of vaporization
738 kJ·mol−1
Molar heat capacity
24.7 J·mol−1 ·K−1
Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
3160
3423
3751
4148
4638
5256
Atomic properties
Oxidation states
8, 7, 6, 5, 4 , 3, 2, 1, 0, -1, -2 (mildly acidic oxide)
Electronegativity
2.2 (Pauling scale)
Ionization energies
1st: 840 kJ·mol−1
2nd: 1600 kJ·mol−1
Atomic radius
135 pm
Covalent radius
144±4 pm
Miscellanea
Crystal structure
hexagonal
Magnetic ordering
paramagnetic[ 1]
Electrical resistivity
(0 °C) 81.2 nΩ·m
Thermal conductivity
87.6 W·m−1 ·K−1
Thermal expansion
(25 °C) 5.1 µm·m−1 ·K−1
Speed of sound (thin rod)
(20 °C) 4940 m·s−1
Shear modulus
222 GPa
Bulk modulus
462 GPa
Poisson ratio
0.25
Mohs hardness
7.0
Brinell hardness
3920 MPa
CAS registry number
7440-04-2
Most stable isotopes
Main article: Isotopes of osmium
iso
NA
half-life
DM
DE (MeV)
DP
184 Os
0.02%
>5.6×1013 y
β+ β+
1.452
184 W
α
2.963
180 W
185 Os
syn
93.6 d
ε
1.013
185 Re
186 Os
1.59%
2.0×1015 y
α
2.822
182 W
187 Os
1.96%
187 Os is stable with 111 neutrons
188 Os
13.24%
188 Os is stable with 112 neutrons
189 Os
16.15%
189 Os is stable with 113 neutrons
190 Os
26.26%
190 Os is stable with 114 neutrons
191 Os
syn
15.4 d
β−
0.314
191 Ir
192 Os
40.78%
>9.8×1012 y
β− β−
0.4135
192 Pt
α
0.3622
188 W
193 Os
syn
30.11 d
β−
1.141
193 Ir
194 Os
syn
6 y
β−
0.097
194 Ir
· r
Ang osmyo (Iningles osmium ) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Os ug kaiphan nga atomik 76. Ang osmyo mao ang puthaw nga transisyon.
↑ Magnetic susceptibility of the elements and inorganic compounds , in Handbook of Chemistry and Physics 81st edition, CRC press.
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