ChemiPlus Logo

Dictionary - Training

Magnesium

12
Mg
24.305
Magnesium
 General | States | Energies | Oxidation & Electrons | Appearance & Characteristics | Reactions | Other Forms Radius | Conductivity | Abundance

General:

Name: Magnesium Symbol: Mg
Group: Alkali Earth Atomic weight: 24.305
Density @ 293 K: 1.738 g/cm3 Atomic volume: 13.97 cm3/mol
Group: Alkali Earth discovered: 1808

States:

state (s, l, g): s
melting point: 922 K boiling point: 1378 K
Heat of fusion: 8.954 kJ/mol Heat of vaporization: 127.40 kJ/mol

Energies:

1st ionization energy: 737.7 kJ/mole
electronegativity: 1.31 2nd ionization energy: 1450.6 kJ/mole
electron affinity: kJ/mole 3rd ionization energy: 7732.6 kJ/mole
Specific heat: 1.02 J/gK heat atomization: 148 kJ/mole atoms

Oxidation & Electrons:

Shells: 2,8,2 electron configuration: [Ne] 3s2
minimum oxidation number: 0 maximum oxidation number: 2
min. common oxidation no.: 0 max. common oxidation no.: 2

Appearance & Characteristics:

structure: hcp: hexagonal close pkd color: silvery
uses: alloys, flash bulbs toxicity:
hardness: 2 mohs characteristics: burns brightly

Reactions:

reaction with air: vigorous,w/ht =>MgO,Mg3N2
reaction with 6M HCl: mild, =>H2, MgCl2 reaction with 6M HCl: mild, =>H2, MgCl2
reaction with 15M HNO3: vigorous, =>NOx, Mg(NO3)2 reaction with 6M NaOH: none

Other Forms:

number of isotopes: 3 hydride(s): MgH2
oxide(s): MgO chloride(s): MgCl2

Radius:

ionic radius (2- ion): pm ionic radius (1- ion): pm
atomic radius: 160 pm ionic radius (1+ ion): pm
ionic radius (2+ ion): 86 pm ionic radius (3+ ion): pm

Conductivity:

thermal conductivity: 156 J/m-sec-deg
electrical conductivity: 224.719 1/mohm-cm polarizability: 10.6 A^3

Abundance:

source: Seawater, magnesite
rel. abund. solar system: 6.031 log abundance earth's crust: 4.4 log
cost, pure: 3.7 $/100g cost, bulk: 0.32 $/100g