ପୋଟାସିଅମ

Potassium,  ₁₉K

Potassium pearls under paraffin oil. The large pearl measures 0.5 cm. Below: spectral lines of potassium
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	potassium, K
Appearance	silvery gray
ଉଚ୍ଚାରଣ	/pˈtæsiəm/ po-TAS-ee-əm
Potassium in the periodic table
Na ↑ K ↓ Rb argon ← potassium → calcium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	19
ଶ୍ରେଣୀ, ବ୍ଳକ	group 1 (alkali metals), s-block
ପର୍ଯ୍ୟାୟ	period 4
ମୌଳିକ ପ୍ରକାର	alkali metal
ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar)	39.0983(1)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Ar] 4s1
per shell	2, 8, 8, 1
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	336.53 K ​(63.38 °C, ​146.08 °F)
ସ୍ଫୁଟନାଙ୍କ	1032 K ​(759 °C, ​1398 °F)
Density near r.t.	0.862 g/cm3
when liquid, at m.p.	0.828 g/cm3
Triple point	336.35 K, ​ kPa
Heat of fusion	2.33 kJ/mol
Heat of	76.9 kJ/mol
Molar heat capacity	29.6 J/(mol·K)
Atomic properties
Oxidation states	1 ​strongly basic oxide
Electronegativity	Pauling scale: 0.82
energies	(more)
Atomic radius	empirical: 227 pm
Covalent radius	203±12 pm
Van der Waals radius	275 pm
Miscellanea
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 n Ω·m (at 20 °C)
Magnetic ordering	paramagnetic
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
ଇତିହାସ
ଆବିଷ୍କାର	Humphry Davy (1807)
First isolation	Humphry Davy (1807)
Most stable isotopes of potassium
iso NA half-life DM DE (MeV) DP 39K 93.26% 39K is stable with 20 neutrons 40K 0.012% 1.248(3)×109 y β− 1.311 40Ca ε 1.505 40Ar β+ 1.505 40Ar 41K 6.73% 41K is stable with 22 neutrons

ପୋଟାସିଅମ (English: Potassium) ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ K ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୧୯ ।

ଆଧାର

• Burkhardt, Elizabeth R.; et al. (2006). "Potassium and Potassium Alloys". Ullmann's Encyclopedia of Industrial Chemistry. Vol. A22. pp. 31–38. doi:10.1002/14356007.a22_031.pub2. ISBN 3-527-30673-0.
• Greenwood, Norman N (1997). Chemistry of the Elements (2 ed.). Oxford: Butterworth-Heinemann. ISBN 0-08-037941-9. {{cite book}}: Invalid |ref=harv (help); Unknown parameter |coauthor= ignored (|author= suggested) (help)
• Holleman, Arnold F.; Wiberg, Egon; Wiberg, Nils (1985). "Potassium". Lehrbuch der Anorganischen Chemie (in German) (91–100 ed.). Walter de Gruyter. ISBN 3-11-007511-3. {{cite book}}: Invalid |ref=harv (help)CS1 maint: unrecognized language (link)
• Schultz, H.; et al. (2006). "Potassium compounds". Ullmann's Encyclopedia of Industrial Chemistry. Vol. A22. pp. 39–103. doi:10.1002/14356007.a22_031.pub2. ISBN 3-527-30673-0.

ବାହାର ଲିଙ୍କ

• Potassium at The Periodic Table of Videos (University of Nottingham)