Properties of Potassium

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Property	Unit	Value
Name	-	Potassium
Abbrevation	-	K
Atomic Number	-	19
Group	-	AM
Heat of Fusion	Kcal/g-mole	0.56
Heat of Vaporization	Kcal/g-mole	31.19
Molecular Weight	g/g-mole	39.09830
Melting Point	�C	63.2
Boiling Point	�C	763
Refractive Index	-	N/A
Critical Temperature	�C	1866.9
Critical Pressure	atm	157.910
Critical Volume	cm�/g-mol	201.38018
Atomic Volume	cm�/g-mol	45.94
Atomic Radii (Bragg-Slater)	pm	280
Atomic Radii (Covalent)	pm	196
Atomic Radii (Van der Walls)	pm	220
Density	g/cm�	0.86200
Oxidation State	-	1
Electron Configuration	-	[Ar]4s
Electron Affinity (Theory)	KJ/g-mol	45
Electron Affinity (Exp)	KJ/g-mol	48.4
Electronegativity (Pauling)	-	0.82
Electronegativity (Sanderson)	-	0.74
Electronegativity (Allred_Rochow)	-	0.91
Surface Tension @BP	dyn/cm	117.0
NMR Frequencies of Nuclei	MHz	4.667
Discovery Date	-	1807
Electric Resistivity	mohm-cm	6.15
Linear Thermal Expansion Coefficient	1E-6 cm/cm/�C	83
Neutron Capture Cross Section	barns	2.2
Thermal Conductivity	W/m/K	102.4
Magnetic Susceptibility	1e-9 m�/kg	6.7
Abundance, (Sun)	log(atoms/1E12 atoms H)	5.2
Abundance, (Meteorite)	log(atoms/atoms)	5.17
Abundance, (Earth)	log(pbbw)	5.1
Abundance, (Crust)	log(pbbw)	6.96
Abundance, (Ocean)	log(1E-12 mol/kg)	10.01
Abundance, (Body)	log(ppmw)	5.1
Electrical Conductivity	%IACS	N/A
Electrical Resistance	-	6.15
Photoelectric Work Function	eV	2.22
Hall's Coefficient	1E-12* volt-cm/amp-Oe	N/A
Electrochemical Equivalent	mg/coulomb	0.40514
Young's Modulus of Elasticity	1E-6 kg/cm�	0.0361
Shear Modulus	1E-6 kg/cm�	0.013
Bulk Modulus	1E-6 kg/cm�	0.0324
Poisson's Ratio	-	0.35
Hardness	-	N/A
Hardness Unit	-

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