Antimony, 51Sb |
| Antimony |
|---|
| Pronunciation | |
|---|
| Appearance | sillery lustrous gray |
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| Standard atomic weight Ar, std(Sb) | 7002121760000000000♠121.760(1)[1] |
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| Antimony in the periodic cairt |
|---|
|
|
| Atomic nummer (Z) | 51 |
|---|
| Group | group 15 (pnictogens) |
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| Period | period 5 |
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| Block | p-block |
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| Element category | Metalloid |
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| Electron confeeguration | [Kr] 4d10 5s2 5p3 |
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| Electrons per shell | 2, 8, 18, 18, 5 |
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| Pheesical properties |
|---|
| Phase at STP | solit |
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| Meltin pynt | 903.78 K (630.63 °C, 1167.13 °F) |
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| Bylin pynt | 1860 K (1587 °C, 2889 °F) |
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| Density (near r.t.) | 6.697 g/cm3 |
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| when liquid (at m.p.) | 6.53 g/cm3 |
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| Heat o fusion | 19.79 kJ/mol |
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| Heat o vapourisation | 193.43 kJ/mol |
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| Molar heat capacity | 25.23 J/(mol·K) |
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Vapour pressur
| P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
| at T (K)
|
807
|
876
|
1011
|
1219
|
1491
|
1858
|
|
| Atomic properties |
|---|
| Oxidation states | −3, −2, −1, 0,[2] +1, +2, +3, +4, +5 (an amphoteric oxide) |
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| Electronegativity | Pauling scale: 2.05 |
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| Ionisation energies | |
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| Atomic radius | empirical: 140 pm |
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| Covalent radius | 139±5 pm |
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| Van der Waals radius | 206 pm |
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 Colour lines in a spectral rangeSpectral lines o antimony |
| Ither properties |
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| Naitural occurrence | primordial |
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| Creestal structur | trigonal |
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| Speed o soond thin rod | 3420 m/s (at 20 °C) |
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| Thermal expansion | 11 µm/(m·K) (at 25 °C) |
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| Thermal conductivity | 24.4 W/(m·K) |
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| Electrical resistivity | 417 n Ω·m (at 20 °C) |
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| Magnetic orderin | diamagnetic[3] |
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| Young's modulus | 55 GPa |
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| Shear modulus | 20 GPa |
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| Bulk modulus | 42 GPa |
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| Mohs haurdness | 3.0 |
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| Brinell haurdness | 294 MPa |
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| CAS Nummer | 7440-36-0 |
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| History |
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| Diskivery | 3000 BC |
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| First isolation | Vannoccio Biringuccio (1540) |
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| Main isotopes o antimony |
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|
|
| Decay modes in parentheses are predictit, but hae nae yet been observed |
| | references |
| style="text-align:left"|
|
|
|
in
|
calc from C
|
diff
|
report
|
ref
|
| C
|
630.63
|
—
|
—
|
|
|
| K
|
903.78
|
903.78
|
0
|
|
|
| F
|
1167.13
|
1167.13
|
0
|
|
|
| WD
|
1166 !1166 Fahrenheit 
|
|
|
[4]
|
| input
|
C: 630.63, K: 903.78, F: 1167.13
|
| comment
|
|
| style="text-align:left"|
|
|
|
in
|
calc from C
|
diff
|
report
|
ref
|
| C
|
1587
|
—
|
—
|
|
|
| K
|
1860
|
1860
|
0
|
|
|
| F
|
2889
|
2889
|
0
|
|
|
| WD
|
2975 !2975 Fahrenheit
|
|
|
[4]
|
| input
|
C: 1587, K: 1860, F: 2889
|
| comment
|
|
References
Thir references will appear in the airticle, but this list appears anerly on this page.
- ↑ Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
- ↑ Anastas Sidiropoulos. "Studies of N-heterocyclic Carbene (NHC) Complexes of the Main Group Elements" (PDF). p. 39.
- ↑ Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
- ↑ a b http://www.cdc.gov/niosh/npg/npgd0036.html.
