Properties of Selenium

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Property	Unit	Value
Name	-	Selenium
Abbrevation	-	Se
Atomic Number	-	34
Group	-	NM
Heat of Fusion	Kcal/g-mole	1.4
Heat of Vaporization	Kcal/g-mole	53.19
Molecular Weight	g/g-mole	78.96000
Melting Point	�C	219.85
Boiling Point	�C	684
Refractive Index	-	2.75
Critical Temperature	�C	1483.9
Critical Pressure	atm	N/A
Critical Volume	cm�/g-mol	N/A
Atomic Volume	cm�/g-mol	16.42
Atomic Radii (Bragg-Slater)	pm	190
Atomic Radii (Covalent)	pm	117
Atomic Radii (Van der Walls)	pm	115
Density	g/cm�	4.80000
Oxidation State	-	-2,4,6
Electron Configuration	-	[Ar]3d10 4s2 4p4
Electron Affinity (Theory)	KJ/g-mol	204-212
Electron Affinity (Exp)	KJ/g-mol	195
Electronegativity (Pauling)	-	2.55
Electronegativity (Sanderson)	-	2.76
Electronegativity (Allred_Rochow)	-	2.48
Surface Tension @BP	dyn/cm	N/A
NMR Frequencies of Nuclei	MHz	19.092
Discovery Date	-	1817
Electric Resistivity	mohm-cm	1000000
Linear Thermal Expansion Coefficient	1E-6 cm/cm/�C	36.9
Neutron Capture Cross Section	barns	12.2
Thermal Conductivity	W/m/K	2.04
Magnetic Susceptibility	1e-9 m�/kg	-4
Abundance, (Sun)	log(atoms/1E12 atoms H)	0
Abundance, (Meteorite)	log(atoms/atoms)	3.4
Abundance, (Earth)	log(pbbw)	4.1
Abundance, (Crust)	log(pbbw)	1.7
Abundance, (Ocean)	log(1E-12 mol/kg)	3
Abundance, (Body)	log(ppmw)	0
Electrical Conductivity	%IACS	N/A
Electrical Resistance	-	12
Photoelectric Work Function	eV	4.72
Hall's Coefficient	1E-12* volt-cm/amp-Oe	N/A
Electrochemical Equivalent	mg/coulomb	0.32
Young's Modulus of Elasticity	1E-6 kg/cm�	0.591
Shear Modulus	1E-6 kg/cm�	0.221
Bulk Modulus	1E-6 kg/cm�	0.09276
Poisson's Ratio	-	0.338
Hardness	-	2
Hardness Unit	-	MOHS

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