Lithium

Atomic properties
Atomic number	3
Standard atomic weight	6.941(2)
Electron configuration	1s2 2s1
Physical properties
Melting point	179 °C (452 K)
Boiling point	1317 °C (1590 K)
Chemical properties
Solubility in water	reacts
Ionization energies
1st	5.392 eV; 520.25 kJ mol−1
2nd	75.638 eV; 7298.0 kJ mol−1
3rd	122.451 eV; 11 814.7 kJ mol−1
Total	203.481 eV; 19 632.9 kJ mol−1
Thermodynamic properties
Standard entropy	29.12(20) J K−1 mol−1
Enthalpy change of atomization	159.3(10) kJ mol−1
Entropy change of atomization	138.782(10) J K−1 mol−1
Enthalpy change of fusion	2.38 kJ mol−1
Hazards
GHS pictograms
GHS signal word	DANGER
GHS hazard statements	H260, H314, <span class="abbr" style="color: blue; border-bottom: 1px dotted blue" title="Error in hazard statements">HEU014
Miscellaneous
CAS number	7439-93-2
EC number	231-102-5
	Where appropriate, and unless otherwise stated, data are given for 100 kPa (1 bar) and 298.15 K (25 °C).
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helium ← lithium → beryllium

H
↑
Li
↓
Na

Lithium (symbol: Li) is a chemical element, the lightest of the alkali metals.

Notes and references

↑ ^1.0 ^1.1 Lithium. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3D1S/Li>. (accessed 20 June 2010).
↑ CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; p E-65. ISBN 0-8493-0462-8.
↑ Cox, J. D.; Wagman, D. D.; Medvedev, V. A. CODATA Key Values for Thermodynamics; Hemisphere: New York, 1989. ISBN 0891167587, <http://www.codata.org/resources/databases/key1.html>.
↑ Index no. 003-001-00-4 of Annex VI, Part 3, to Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation (EC) No 1907/2006. OJEU L353, 31.12.2008, pp 1–1355 at p 340.

See also the corresponding article on Wikipedia.

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