General: |
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Name: Magnesium
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Symbol: Mg
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Group: Alkali Earth
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Atomic weight: 24.305
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Density @ 293 K: 1.738 g/cm3
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Atomic volume: 13.97 cm3/mol
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Group: Alkali Earth
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discovered: 1808
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States: |
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state (s, l, g): s
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melting point: 922 K
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boiling point: 1378 K
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Heat of fusion: 8.954 kJ/mol
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Heat of vaporization: 127.40 kJ/mol
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Energies: |
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1st ionization energy: 737.7 kJ/mole
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electronegativity: 1.31
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2nd ionization energy: 1450.6 kJ/mole
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electron affinity: kJ/mole
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3rd ionization energy: 7732.6 kJ/mole
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Specific heat: 1.02 J/gK
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heat atomization: 148 kJ/mole atoms
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Oxidation & Electrons: |
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Shells: 2,8,2
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electron configuration: [Ne] 3s2
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minimum oxidation number: 0
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maximum oxidation number: 2
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min. common oxidation no.: 0
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max. common oxidation no.: 2
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Appearance & Characteristics: |
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structure: hcp: hexagonal close pkd
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color: silvery
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uses: alloys, flash bulbs
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toxicity:
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hardness: 2 mohs
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characteristics: burns brightly
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Reactions: |
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reaction with air: vigorous,w/ht =>MgO,Mg3N2
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reaction with 6M HCl: mild, =>H2, MgCl2
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reaction with 6M HCl: mild, =>H2, MgCl2
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reaction with 15M HNO3: vigorous, =>NOx, Mg(NO3)2
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reaction with 6M NaOH: none
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Other Forms: |
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number of isotopes: 3
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hydride(s): MgH2
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oxide(s): MgO
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chloride(s): MgCl2
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Radius: |
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ionic radius (2- ion): pm
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ionic radius (1- ion): pm
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atomic radius: 160 pm
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ionic radius (1+ ion): pm
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ionic radius (2+ ion): 86 pm
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ionic radius (3+ ion): pm
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Conductivity: |
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thermal conductivity: 156 J/m-sec-deg
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electrical conductivity: 224.719 1/mohm-cm
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polarizability: 10.6 A^3
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Abundance: |
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source: Seawater, magnesite
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rel. abund. solar system: 6.031 log
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abundance earth's crust: 4.4 log
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cost, pure: 3.7 $/100g
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cost, bulk: 0.32 $/100g
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