Boron Element Properties

Boron

s4
Be
Beryllium
p5
B
Boron
p6
C
Carbon
General
Name(Boron)
Symbol(B)
Number(5)
Group Number(13)
Group(Non-Metal)
Block(p)
Density(2.34 g/cm3)
Atomic Weight(10.81 g/mol)
Atomic Volume(4.6 cm3/mol)
Discover(1808)


States
State(solid)
Melting Point(2349 K)
Boiling Point(4200 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(50.2 kJ/mol)
Heat of Vaporization(480 kJ/mol)


Energies
First Ionization Energy(800.6 kJ/mole)
Second Ionization Energy(2427 kJ/mole)
Third Ionization Energy(3659.7 kJ/mole)
Electronegativity(2.04)
Electron Affinity(26.7 kJ/mole)
Specific Heat(1.02 J/gK)
Heat Atomization(573 kJ/mole atoms)


Oxidation and Electrons
Shells(2,3)
Electron Configuration(1s2 2s2 2p2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(3)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(3)


Appearance and Characteristics
Crystal Structure(rhombohedral)
Characteristics(B12 icosahedra; 3 forms)
Color(black/brown)
Uses(borax, glass making(B2O3))
Hardness(9.5 mohs)
Toxicity(None)


Reactions
Reaction with Air(mild, w/ht =>B2O3)
Reaction with 6M HCl(None)
Reaction with 15M HNO3(None)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(2)
Hydride(B2H6 and many BxHy)
Oxide(B2O3)
Chloride(BCl3 and many BxCly)


Radius
Atomic Radius(85 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)(41 pm)


Conductivity
Thermal Conductivity(27.4 J/m-sec-deg)
Electrical Conductivity(0 1/mohm-cm)
Polarizability(3 A3)


Abundance
Source(Na and Ca borates (misc))
Relation Abundance Solar System(1.326 log)
Abundance Earths Crust(1 log)


s4
Be
Beryllium
p5
B
Boron
p6
C
Carbon

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