Template:Infobox beryllium
- Temp: comparing dataset and input-parameter here to check. No effect in article. [January 2019]
- ok
- [He] 2s2 -- infobox
- [He] 2s2 -- dataset
- Using symb-to-elconfig dataset now. DIFFs marked here may be caused by technical issues wrt reference handling, not actual diffs. -DePiep (talk) 20:17, 3 February 2019 (UTC)
General properties | |||||||||||||||||||||||
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Pronunciation | /bəˈrɪliəm/ | ||||||||||||||||||||||
Appearance | white-gray metallic | ||||||||||||||||||||||
Standard atomic weight (Ar, standard) | 9.0121831(5)[1] | ||||||||||||||||||||||
Beryllium in the periodic table | |||||||||||||||||||||||
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Atomic number (Z) | 4 | ||||||||||||||||||||||
Group | group 2 (alkaline earth metals) | ||||||||||||||||||||||
Period | period 2 | ||||||||||||||||||||||
Block | s-block | ||||||||||||||||||||||
Element category | alkaline earth metal | ||||||||||||||||||||||
Electron configuration | [He] 2s2 | ||||||||||||||||||||||
Electrons per shell | 2, 2 | ||||||||||||||||||||||
Physical properties | |||||||||||||||||||||||
Phase at STP | Be: Solid | ||||||||||||||||||||||
Melting point | 1560 K (1287 °C, 2349 °F) | ||||||||||||||||||||||
Boiling point | 2742 K (2469 °C, 4476 °F) | ||||||||||||||||||||||
Density (near r.t.) | 1.85 g/cm3 | ||||||||||||||||||||||
when liquid (at m.p.) | 1.690 g/cm3 | ||||||||||||||||||||||
Critical point | 5205 K, MPa (extrapolated) | ||||||||||||||||||||||
Heat of fusion | 12.2 kJ/mol | ||||||||||||||||||||||
Heat of vaporization | 292 kJ/mol | ||||||||||||||||||||||
Molar heat capacity | 16.443 J/(mol·K) | ||||||||||||||||||||||
Vapor pressure
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Atomic properties | |||||||||||||||||||||||
Oxidation states | +1,[2] +2 (an amphoteric oxide) | ||||||||||||||||||||||
Electronegativity | Pauling scale: 1.57 | ||||||||||||||||||||||
Ionization energies |
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Atomic radius | empirical: 112 pm | ||||||||||||||||||||||
Covalent radius | 96±3 pm | ||||||||||||||||||||||
Van der Waals radius | 153 pm | ||||||||||||||||||||||
Spectral lines of beryllium | |||||||||||||||||||||||
Other properties | |||||||||||||||||||||||
Natural occurrence | Be: Primordial | ||||||||||||||||||||||
Crystal structure | hexagonal close-packed (hcp) | ||||||||||||||||||||||
Speed of sound thin rod | 12,890 m/s (at r.t.)[3] | ||||||||||||||||||||||
Thermal expansion | 11.3 µm/(m·K) (at 25 °C) | ||||||||||||||||||||||
Thermal conductivity | 200 W/(m·K) | ||||||||||||||||||||||
Electrical resistivity | 36 nΩ·m (at 20 °C) | ||||||||||||||||||||||
Magnetic ordering | diamagnetic | ||||||||||||||||||||||
Magnetic susceptibility | −9.0·10−6 cm3/mol[4] | ||||||||||||||||||||||
Young's modulus | 287 GPa | ||||||||||||||||||||||
Shear modulus | 132 GPa | ||||||||||||||||||||||
Bulk modulus | 130 GPa | ||||||||||||||||||||||
Poisson ratio | 0.032 | ||||||||||||||||||||||
Mohs hardness | 5.5 | ||||||||||||||||||||||
Vickers hardness | 1670 MPa | ||||||||||||||||||||||
Brinell hardness | 590–1320 MPa | ||||||||||||||||||||||
CAS Number | 7440-41-7 | ||||||||||||||||||||||
History | |||||||||||||||||||||||
Discovery | Louis Nicolas Vauquelin (1798) | ||||||||||||||||||||||
First isolation | Friedrich Wöhler & Antoine Bussy (1828) | ||||||||||||||||||||||
Main isotopes of beryllium | |||||||||||||||||||||||
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References
- ↑ Meija, J.; Coplen, T. B.; Berglund, M.; Brand, W.A.; De Bièvre, P.; Gröning, M.; Holden, N.E.; Irrgeher, J.; Loss, R.D.; Walczyk, T.; Prohaska, T. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
{{cite journal}}
: Unknown parameter|displayauthors=
ignored (|display-authors=
suggested) (help) - ↑ "Beryllium: Beryllium(I) Hydride compound data" (PDF). bernath.uwaterloo.ca. Retrieved 2007-12-10. }}
- ↑ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 14.48. ISBN 1439855110.
- ↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.
- ↑ "Beryllium: Beryllium(I) Hydride compound data" (PDF). bernath.uwaterloo.ca. Retrieved 2007-12-10.
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