Number Of Electrons In Magnesium



Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. The atomic number of magnesium is 12, which means that in its stable state, it has 12 protons and 12 electrons. An ion forms when an atom either loses or gains electrons. If the atom gains electrons, it becomes a negatively charged ion. If it loses electrons, it becomes a positively charged ion. In Magnesium, the number of electrons in K shell is: A. Atomic number of M g is 1 2. So, K = 2, L = 8, M = 2, N = 0. How satisfied are you with the answer? If K and L shells of an atom are full, then what will be the total number of electrons. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. The chemical symbol for Magnesium is Mg. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. The nucleus is composed of protons and neutrons.

Element Magnesium - Mg

Number Of Electrons In Magnesium Ion

Comprehensive data on the chemical element Magnesium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Magnesium. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

Number Of Electrons In Magnesium

The Number Of Electrons In Magnesium

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Overview of Magnesium

  • Atomic Number: 12
  • Group: 2
  • Period: 3
  • Series: Alkali Earth Metals

Magnesium's Name in Other Languages

  • Latin: Magnesium
  • Czech: Hořčík
  • Croatian: Magnezij
  • French: Magnésium
  • German: Magnesium - r
  • Italian: Magnesio
  • Norwegian: Magnesium
  • Portuguese: Magnésio
  • Russian: Магний
  • Spanish: Magnesio
  • Swedish: Magnesium

Atomic Structure of Magnesium

  • Atomic Radius: 1.72Å
  • Atomic Volume: 13.97cm3/mol
  • Covalent Radius: 1.36Å
  • Cross Section (Thermal Neutron Capture)σa/barns: 0.063
  • Crystal Structure: Hexagonal
  • Electron Configuration:
    1s2 2s2p6 3s2
  • Electrons per Energy Level: 2,8,2
    Shell Model
  • Ionic Radius: 0.72Å
  • Filling Orbital: 3s2
  • Number of Electrons (with no charge): 12
  • Number of Neutrons (most common/stable nuclide): 12
  • Number of Protons: 12
  • Oxidation States: 2
  • Valence Electrons: 3s2
    Electron Dot Model

Chemical Properties of Magnesium

  • Electrochemical Equivalent: 0.45341g/amp-hr
  • Electron Work Function: 3.66eV
  • Electronegativity: 1.31 (Pauling); 1.23 (Allrod Rochow)
  • Heat of Fusion: 8.954kJ/mol
  • Incompatibilities:
  • Ionization Potential
    • First: 7.646
    • Second: 15.035
    • Third: 80.143
  • Valence Electron Potential (-eV): 40

Physical Properties of Magnesium

  • Atomic Mass Average: 24.305
  • Boiling Point: 1363K 1090°C 1994°F
  • Coefficient of lineal thermal expansion/K-1: 26.1E-6
  • Conductivity
    Electrical: 0.226 106/cm Ω
    Thermal: 1.56 W/cmK
  • Density: 1.738g/cc @ 300K
  • Description:
    Grayish-white metal. Reacts with hot water and burns in air when ignited.
  • Elastic Modulus:
    • Bulk: 35.6/GPa
    • Rigidity: 17.3/GPa
    • Youngs: 44.7/GPa
  • Enthalpy of Atomization: 148.5 kJ/mole @ 25°C
  • Enthalpy of Fusion: 8.95 kJ/mole
  • Enthalpy of Vaporization: 128.7 kJ/mole
  • Flammablity Class:
  • Freezing Point:see melting point
  • Hardness Scale
    • Brinell: 260 MN m-2
    • Mohs: 2.5
  • Heat of Vaporization: 127.4kJ/mol
  • Melting Point: 922K 649°C 1200°F
  • Molar Volume: 13.97 cm3/mole
  • Optical Reflectivity: 74%
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 1.02J/gK
  • Vapor Pressure = 361Pa@649°C

Regulatory / Health

  • CAS Number
    • 7439-95-4
  • OSHAPermissible Exposure Limit (PEL)
    • No limits set by OSHA
  • OSHA PEL Vacated 1989
    • No limits set by OSHA
  • NIOSHRecommended Exposure Limit (REL)
    • No limits set by NIOSH
  • Levels In Humans:
    Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
    • Blood/mg dm-3: 37.8
    • Bone/p.p.m: 700-1800
    • Liver/p.p.m: 590
    • Muscle/p.p.m: 900
    • Daily Dietary Intake: 250-380 mg
    • Total Mass In Avg. 70kg human: 19 g
  • Discovery Year: 1808
  • Name Origin:
    Greek: From Magnesia a district of Thessaly.
  • Abundance of Magnesium:
    • Earth's Crust/p.p.m.: 23000
    • Seawater/p.p.m.: 1200
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 4E+07
  • Sources of Magnesium:
    Usually obtained by electrolysis of melted magnesium chloride (MgCl2) found in sea water. World production is around 350,000 tons per year. Primary mining areas are Austria, China, Poland, Russia, USA, India, Greece and Canada.
  • Uses of Magnesium:
    Used in alloys to make airplanes, missiles, racing bikes and other things that need light metals. Also used in fireplace bricks, flashbulbs, pigments and filters.
  • Additional Notes:
    In 1755 Joseph Black in Edinburgh Scotland recognized magnesium as an element, however, it wasn't issolated until 1808 by Sir Humphrey Davy.

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References

A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

Related Resources

  • Anatomy of the Atom
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  • Molarity, Molality and Normality
    Introduces stoichiometry and explains the differences between molarity, molality and normality.
  • Molar Mass Calculations and Javascript Calculator
    Molar mass calculations are explained and there is a JavaScript calculator to aid calculations.
  • Chemical Database
    This database focuses on the most common chemical compounds used in the home and industry.

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Number Of Electrons In Magnesium

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