Calcium Element Properties

Calcium

s19
K
Potassium
s20
Ca
Calcium
d21
Sc
Scandium
General
Name(Calcium)
Symbol(Ca)
Number(20)
Group Number(2)
Group(Alkali earth metals)
Block(s)
Density(1.55 g/cm3)
Atomic Weight(40.08 g/mol)
Atomic Volume(29.9 cm3/mol)
Discover(1808)


States
State(Solid)
Melting Point(1115 K)
Boiling Point(1115 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(8.54 kJ/mol)
Heat of Vaporization(154.7 kJ/mol)


Energies
First Ionization Energy(589.8 kJ/mole)
Second Ionization Energy(1145.4 kJ/mole)
Third Ionization Energy(4911.8 kJ/mole)
Electronegativity(1)
Electron Affinity(Nil)
Specific Heat(0.63 J/gK)
Heat Atomization(178 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,8,2)
Electron Configuration([Ar] 4s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(2)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(2)


Appearance and Characteristics
Crystal Structure(cubic face centered)
Characteristics(burns brightly)
Color(silvery-white)
Uses(lime, cement)
Hardness(1.5 mohs)
Toxicity(None)


Reactions
Reaction with Air(vigorous, =>CaO, Ca3N2)
Reaction with 6M HCl(vigorous, =>H2, CaCl2)
Reaction with 15M HNO3(vigorous, =>H2, Ca(NO3)2)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(6)
Hydride(CaH2)
Oxide(CaO)
Chloride(CaCl2)


Radius
Atomic Radius(197 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(114 pm)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(Nil)


Conductivity
Thermal Conductivity(201 J/m-sec-deg)
Electrical Conductivity(255.754 1/mohm-cm)
Polarizability(22.8 A3)


Abundance
Source(Calcite (oxide))
Relation Abundance Solar System(4.786 log)
Abundance Earths Crust(4.65 log)


s19
K
Potassium
s20
Ca
Calcium
d21
Sc
Scandium

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