Mg2+ is the chemical symbol of magnesium ion with two positive charges.
Basic information
Element name: magnesium (měi) symbolic expression: mg 2+.
Element type: metal? Relative atomic mass: 24.3 1.
Finder: David. Year of discovery: 1808.
Chemical formula of magnesium element: number of protons in magnesium nucleus: 12.
Number of electrons outside the nucleus: 10.
Nuclear power charge: 12.
Atomic volume: (cubic centimeter/mole)
13.97
Content of elements in the sun: (ppm)
700
Element content in seawater: (ppm)
1200
Content in the shell: (ppm)
23000
Electronegativity: 1.3 1
Oxidation state:
primary
magnesian ion
other
Ionization energy? (kJ/mol)
Male-male+737.7
M+ - M2+ 1450.7
M2+ - M3+ 7732.6
M3+ - M4+ 10540
M4+ - M5+ 13630
M5+ - M6+ 17995
M6+ - M7+ 2 1703
M7+ - M8+ 25656
M8+ - M9+ 3 1642
M9+ - M 10+ 3546 1
Peripheral electronic configuration: 3s2? Extranuclear electron configuration: 2,8,2
Crystal structure: the unit cell is hexagonal.
Cell parameters:
a = 320.94 pm
b = 320.94 pm
c = 52 1.08 pm
α = 90
β = 90
γ = 120
Mohs hardness: 2.5
Isotope and radiation: mg-24 mg-25 mg-26 mg-27 [9.45 m] mg-28 [21h].
Electron affinity and energy:-21kj mol-1.
The first ionization energy is 738 kj mol-1,the second ionization energy is1451kj mol-1,and the third ionization energy is 7733 kj mol-1.
Element density: 1.738 g/cm3 Element melting point: 650.0℃ Element boiling point: 1 170.0℃.
Atomic radius: 1.72 angstrom? Ion radius: 0.66(+2) A? Covalent radius: 1.36 angstrom.