Discovered By: Joseph Black
Discovery year: 1755

The following table showing some properties of Magnesium(Mg):

Table Example
Atomic number 12
Group 2
period 3
Block s
Electrons 12
Protons 12
Neutrons 12
Atomic weight 24.305
Oxidation states +2
Ionic charge Mg^2+


Table Example
Electrons per shell K2 L8 M2
Elecron configuration 1s^2 2s^2 2p^6 3s^2
Atomic radius 145 pm
Covalent radius 141 pm
Van der Waals radius 173 pm
Boiling point 1090°C
melting point 650°C
Phase Solid
Fusion heat 8.7 kJ.mol^-1
Specific heat 1020 J.kg^-1.K^-1


Table Example
Thermal expansion 2.5.10^-5 K^-1
Vaporization heat 128 kJ.mol^-1
Color Silver
Brinell hardness 260 MPa
Bulk modulus 45 GPa
Density 1738 kg.m^-3
Liquid density 1584 kg.m^-3
Mohs hardness 2.5
Poisson ratio 0.29
Shear modulus 17 GPa


Table Example
Sound speed 4602 m.s^-1
Thermal conductivity 160 W.m^-1.k^-1
Young's modulus 45 GPa
Electrical conductivity 2.3*10^7 S.m^-1
Electric type Conductor
Magnetic type Paramagnetic
Electronegativity 1.31
Valence 2
Radioactive No
Neutron cross section 0.063 barn