Arsenic Element Properties

Arsenic

p32
Ge
Germanium
p33
As
Arsenic
p34
Se
Selenium
General
Name(Arsenic)
Symbol(As)
Number(33)
Group Number(15)
Group(Non-Metal, Nitrogen group)
Block(p)
Density(5.72 g/cm3)
Atomic Weight(74.9216 g/mol)
Atomic Volume(13.1 cm3/mol)
Discover(1600)


States
State(Solid)
Melting Point(1090 K)
Boiling Point(887 K)
Triple Point(Nil)
Critical Point(1673 K)
Heat of Fusion(24.44 kJ/mol)
Heat of Vaporization(34.76 kJ/mol)


Energies
First Ionization Energy(946.5 kJ/mole)
Second Ionization Energy(1797.8 kJ/mole)
Third Ionization Energy(2735.4 kJ/mole)
Electronegativity(2.18)
Electron Affinity(78 kJ/mole)
Specific Heat(0.33 J/gK)
Heat Atomization(302 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,5)
Electron Configuration([Ar] 3d10 4s2 4p3)
Minimum Oxidation Number(-3)
Maximum Oxidation Number(5)
Minimum Common Oxidation Number(-3)
Maximum Common Oxidation Number(5)


Appearance and Characteristics
Crystal Structure(rhombohedral)
Characteristics(semimetal, brittle, 3 forms)
Color(gray)
Uses(photocells (GaAs), poisons)
Hardness(3.5 mohs)
Toxicity(None)


Reactions
Reaction with Air(mild, w/ht =>As4O6)
Reaction with 6M HCl(None)
Reaction with 15M HNO3(mild, w/ht =>H3AsO4, NOx)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(1)
Hydride(AsH3)
Oxide(As2O3)
Chloride(AsCl3 AsCl5)


Radius
Atomic Radius(120 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(Nil)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(72 pm)


Conductivity
Thermal Conductivity(50.2 J/m-sec-deg)
Electrical Conductivity(30.03 1/mohm-cm)
Polarizability(4.3 A3)


Abundance
Source(Arsenopyrite, enargite (misc))
Relation Abundance Solar System(0.817 log)
Abundance Earths Crust(0.3 log)


p32
Ge
Germanium
p33
As
Arsenic
p34
Se
Selenium

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