ഫലകം:Infobox potassium

Potassium, ₀₀K
	Potassium pearls (in paraffin oil, ~5 mm each)
Potassium
Pronunciation	/pəˈtæsiəm/ (pə-TAS-ee-əm)
Appearance	silvery gray
Standard atomic weight Ar°(K)
	ഫലകം:Infobox element/standard atomic weight format
Potassium in the periodic table
	argon ← potassium → calcium
Group	group 1: hydrogen and alkali metals
Period	period 4
Block	s-block
Electron configuration	[Ar] 4s1
Electrons per shell	2, 8, 8, 1
Physical properties
Phase at STP	solid
Melting point	336.7 K (63.5 °C, 146.3 °F)
Boiling point	1032 K (759 °C, 1398 °F)
Density (near r.t.)	0.862 g/cm3
when liquid (at m.p.)	0.828 g/cm3
Critical point	2223 K, 16 MPa
Heat of fusion	2.33 kJ/mol
Heat of vaporization	76.9 kJ/mol
Molar heat capacity	29.6 J/(mol·K)
Atomic properties
Oxidation states	−1, +1 (a strongly basic oxide)
Electronegativity	Pauling scale: 0.82
Ionization energies	1st: 418.8 kJ/mol ; 2nd: 3052 kJ/mol ; 3rd: 4420 kJ/mol ; (more) ;
Atomic radius	empirical: 227 pm
Covalent radius	203±12 pm
Van der Waals radius	275 pm
	Spectral lines of potassium
Other properties
Natural occurrence	primordial
Crystal structure	body-centered cubic (bcc)
Speed of sound thin rod	2000 m/s (at 20 °C)
Thermal expansion	83.3 µm/(m⋅K) (at 25 °C)
Thermal conductivity	102.5 W/(m⋅K)
Electrical resistivity	72 nΩ⋅m (at 20 °C)
Magnetic ordering	paramagnetic
Molar magnetic susceptibility	+20.8·10−6 cm3/mol (298 K)
Young's modulus	3.53 GPa
Shear modulus	1.3 GPa
Bulk modulus	3.1 GPa
Mohs hardness	0.4
Brinell hardness	0.363 MPa
CAS Number	7440-09-7
History
Discovery and first isolation	Humphry Davy (1807)
Symbol	"K": from New Latin kalium
Isotopes of potassium ക; തി;
	Template:infobox potassium isotopes does not exist
	വർഗ്ഗം: Potassium; view; talk; edit; \| references

K · Potassium
	^iso K E infobox E isobox	→ H ibox H
[[:Category:\|cat:K]] (0) cat:K-isotopes (0) Commons Wikidata: Wiktionary
indexes by PT (page) ക തി

Data sets read by {{Infobox element}}
Name and identifiers	view edit
Top image	view edit
image caption	view edit
image alt	view edit
Pronunciation	view edit
Category (enwiki)	view edit
Standard atomic weight	view edit
most stable isotope	view edit
Oxidation states	view edit
Spectral lines image	view edit

References

↑ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.122. ISBN 1439855110.
↑ Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

One of these is a named reference. It may be cited in the containing article as

<ref name="CIAAW2013" /> for the source Atomic weights of the elements 2013 (from subtemplates used by {{Infobox element}})

ഫലകം:വിവരണം/ഭാഗം

[1] Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.122. ISBN 1439855110.

[2] Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

[3] Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

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