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1. Barium Atomic Number And Mass
2. Barium Atomic Number 25
3. Barium Atomic Mass
4. Barium Electron Configuration
5. Number Of Protons In Barium

Element Barium - Ba

Barium: atom sizes. Atomic radius (empirical): 215 pm Molecular single bond covalent radius: 196 (coordination number 2) ppm; van der Waals radius: 303 ppm; More atomc size properties. Atomic Number of Barium. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. The chemical symbol for Barium is Ba. Atomic Mass of Barium. Atomic mass of Barium is 137.327 u. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. The chemical symbol for Barium is Ba. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element.

Barium, complete electron configuration. © 2009-2016 www.prvky.com kontaktkontakt. The electron configuration of barium (atomic number 56) can be written three different ways:- Full configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2- Compressed (without all.

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

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

Barium's Name in Other Languages

Barium Atomic Number And Mass

• 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)σ_a/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 = 98Pa@729°C

Barium Atomic Number 25

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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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
  Answers many questions regarding the structure of atoms.
• 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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Barium Atomic Mass

Kenneth Barbalace. Periodic Table of Elements - Barium - Ba. EnvironmentalChemistry.com. 1995 - 2021. Accessed on-line: 4/24/2021
https://EnvironmentalChemistry.com/yogi/periodic/Ba.html
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Barium Electron Configuration

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Number Of Protons In Barium

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In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present). The number of protons determines how many electrons surround the nucleus, and it is the arrangement of these electrons that determines most of the chemical behavior of an element.

In a periodic table arranged in order of increasing atomic number, elements having similar chemical properties naturally line up in the same column (group). For instance, all of the elements in Group 1A are relatively soft metals, react violently with water, and form 1+ charges; all of the elements in Group 8A are unreactive, monatomic gases at room temperature, etc. In other words, there is a periodic repetition of the properties of the chemical elements with increasing mass.

In the original periodic table published by Dimitri Mendeleev in 1869, the elements were arranged according to increasing atomic mass— at that time, the nucleus had not yet been discovered, and there was no understanding at all of the interior structure of the atom, so atomic mass was the only guide to use. Once the structure of the nucleus was understood, it became clear that it was the atomic number that governed the properties of the elements.