మూస:Infobox caesium

సీజియం, ₀₀Cs
సీజియం
Pronunciation	/ˈsiːziəm/ (SEE-zee-əm)
Appearance	silvery gold
Standard atomic weight Ar°(Cs)
	132.90545196±0.00000006; 132.91±0.01 (abridged);
సీజియం in the periodic table
	జెనాన్ ← సీజియం → బేరియం
Group	మూస:Infobox element/symbol-to-group/format
Period	period 6
Block	s-block
Electron configuration	[Xe] 6s1
Electrons per shell	2, 8, 18, 18, 8, 1
Physical properties
Phase at STP	solid
Melting point	301.7 K (28.5 °C, 83.3 °F)
Boiling point	944 K (671 °C, 1240 °F)
Density (near r.t.)	1.93 g/cm3
when liquid (at m.p.)	1.843 g/cm3
Critical point	1938 K, 9.4 MPa
Heat of fusion	2.09 kJ/mol
Heat of vaporization	63.9 kJ/mol
Molar heat capacity	32.210 J/(mol·K)
Atomic properties
Oxidation states	−1, +1 (a strongly basic oxide)
Electronegativity	Pauling scale: 0.79
Atomic radius	empirical: 265 pm
Covalent radius	244±11 pm
Van der Waals radius	343 pm
	Spectral lines of సీజియం
Other properties
Natural occurrence	primordial
Crystal structure	body-centered cubic (bcc)
Thermal expansion	97 µm/(m⋅K) (at 25 °C)
Thermal conductivity	35.9 W/(m⋅K)
Electrical resistivity	205 n Ω⋅m (at 20 °C)
Magnetic ordering	paramagnetic
Young's modulus	1.7 GPa
Bulk modulus	1.6 GPa
Mohs hardness	0.2
Brinell hardness	0.14 MPa
CAS Number	7440-46-2
History
Discovery	Robert Bunsen and Gustav Kirchhoff (1860)
First isolation	Carl Setterberg (1882)
Isotopes of సీజియం v; e;
	Template:infobox సీజియం isotopes does not exist
	Category: సీజియం; view; talk; edit; \| references

References

↑ "Standard Atomic Weights: Caesium". CIAAW. 2013.
↑ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.
↑ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.121. ISBN 1439855110.
↑ Dye, J. L. (1979). "Compounds of Alkali Metal Anions". Angewandte Chemie International Edition. 18 (8): 587–598. doi:10.1002/anie.197905871.
↑ "Magnetic susceptibility of the elements and inorganic compounds". Handbook of Chemistry and Physics (PDF) (87th ed.). CRC press. ISBN 0-8493-0487-3. Retrieved 2010-09-26.
↑ "NIST Radionuclide Half-Life Measurements". NIST. Retrieved 2011-03-13.

[1] "Standard Atomic Weights: Caesium". CIAAW. 2013.

[CIAAW2021-2] Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.

[b92-3] Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.121. ISBN 1439855110.

[caeside-4] Dye, J. L. (1979). "Compounds of Alkali Metal Anions". Angewandte Chemie International Edition. 18 (8): 587–598. doi:10.1002/anie.197905871.

[magnet-5] "Magnetic susceptibility of the elements and inorganic compounds". Handbook of Chemistry and Physics (PDF) (87th ed.). CRC press. ISBN 0-8493-0487-3. Retrieved 2010-09-26.

[isotope-6] "NIST Radionuclide Half-Life Measurements". NIST. Retrieved 2011-03-13.

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