Atomic Number Of Barium


Element Barium - Ba

Electron ConfigurationXe 6s2. 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s2. Orbital Diagram. Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of barium (atomic number: 56), an isotope of this.Get an answer for 'What is the electron configuration for a Barium ion? Barium is a chemical element with atomic number 56 which means there are 56 protons in its nucleus. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs.

Comprehensive data on the chemical element Barium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Barium. 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.

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Overview of Barium


Barium is a naturally occurring alkaline metalloid element with atomic symbol Ba, atomic number 56, and atomic weight 137 that is only found in combination with other elements, typically barite (barium sulfate) and witherite (barium carbonate), or chemicals. Barium is used in many industrial processes, as well as in diagnostic testing, fireworks, and pesticides. Here are all the Barium is an with an atomic number of 56 answers. CodyCross is an addictive game developed by Fanatee. Are you looking for never-ending fun in this exciting logic-brain app? Each world has more than 20 groups with 5 puzzles each. Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of barium-137 (atomic number: 56), an isotope of this element. The nucleus consists of 56 protons (red) and 81 neutrons (orange). 56 electrons (white) successively occupy available electron shells (rings).

  • Atomic Number: 56
  • Group: 2
  • Period: 6
  • Series: Alkali Earth Metals

Barium's Name in Other Languages

  • Latin: Baryum
  • Czech: Baryum
  • Croatian: Barij
  • French: Baryum
  • German: Barium - s
  • Italian: Bario
  • Norwegian: Barium
  • Portuguese: Bário
  • Russian: Барий
  • Spanish: Bario
  • Swedish: Barium

Atomic Structure of Barium

  • Atomic Radius: 2.78Å
  • Atomic Volume: 39.24cm3/mol
  • Covalent Radius: 1.98Å
  • Cross Section (Thermal Neutron Capture)σa/barns: 1.3
  • Crystal Structure: Cubic body centered
  • Electron Configuration:
    1s2 2s2p6 3s2p6d10 4s2p6d10 5s2p6 6s2
  • Electrons per Energy Level: 2,8,18,18,8,2
    Shell Model
  • Ionic Radius: 1.35Å
  • Filling Orbital: 6s2
  • Number of Electrons (with no charge): 56
  • Number of Neutrons (most common/stable nuclide): 81
  • Number of Protons: 56
  • Oxidation States: 2
  • Valence Electrons: 6s2
    Electron Dot Model

Chemical Properties of Barium

  • Electrochemical Equivalent: 2.5621g/amp-hr
  • Electron Work Function: 2.7eV
  • Electronegativity: 0.89 (Pauling); 0.97 (Allrod Rochow)
  • Heat of Fusion: 7.75kJ/mol
  • Incompatibilities:
  • Ionization Potential
    • First: 5.212
    • Second: 10.004
  • Valence Electron Potential (-eV): 21.3

Physical Properties of Barium

  • Atomic Mass Average: 137.327
  • Boiling Point: 2171K 1898°C 3448°F
  • Coefficient of lineal thermal expansion/K-1: 18.1E-6
  • Conductivity
    Electrical: 0.03 106/cm Ω
    Thermal: 0.184 W/cmK
  • Density: 3.59g/cc @ 300K
  • Description:
    Soft heavy silver colored metal.
  • Elastic Modulus:
    • Bulk: 9.6/GPa
    • Rigidity: 4.86/GPa
    • Youngs: 12.8/GPa
  • Enthalpy of Atomization: 175.7 kJ/mole @ 25°C
  • Enthalpy of Fusion: 7.66 kJ/mole
  • Enthalpy of Vaporization: 140 kJ/mole
  • Flammablity Class:
  • Freezing Point:see melting point
  • Hardness Scale
    • Mohs: 1.25
  • Heat of Vaporization: 142kJ/mol
  • Melting Point: 1002K 729°C 1344°F
  • Molar Volume: 38.21 cm3/mole
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 0.204J/gK
  • Vapor Pressure = [email protected]°C

Regulatory / Health

  • CAS Number
    • 7440-39-3
  • RTECS: CQ8370000
  • NFPA 704
    • Health: 2
    • Fire: 2
    • Reactivity:
    • Special Hazard:
  • 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: 0.068
    • Bone/p.p.m: 3-70
    • Liver/p.p.m: 0.04-1.2
    • Muscle/p.p.m: 0.09
    • Daily Dietary Intake: 0.6-1.7 mg
    • Total Mass In Avg. 70kg human: 22 mg

Who / Where / When / How

  • Discoverer: Sir Humphrey Davy
  • Discovery Location: London England
  • Discovery Year: 1808
  • Name Origin:
    Greek: barys (heavy or dense).
  • Abundance of Barium:
    • Earth's Crust/p.p.m.: 500
    • Seawater/p.p.m.:
      • Atlantic Suface: 0.0047
      • Atlantic Deep: 0.0093
      • Pacific Surface: 0.0047
      • Pacific Deep: 0.02
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 123
  • Sources of Barium:
    Found in barytine (BaSO4) and witherite (BaCO3),never found in pure form due to its reactivity. Total annual world production estimated around 6,000,000 tons. Main mining areas are UK, Italy, Czech Republic, USA and Germany. Total world reserves estimated to be around 450,000,000 tons.
  • Uses of Barium:
    Used in sparkplugs, vacuum tubes, fireworks, fluorescent lamps. Insoluble barium sulfate is used for body imaging.
  • Additional Notes:
    Must be stored under kerosene to remain pure. Soluble barium salts are highly toxic.

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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.

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The Atomic Number Of Barium

Kenneth Barbalace. Periodic Table of Elements - Barium - Ba. 1995 - 2021. Accessed on-line: 4/24/2021

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Atomic Number Of Barium

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