Ga Atomic Number

Ga-69 is used for production of the radioisotope Ge-68. This isotope is used for so-called Ge-68/Ga-68 generators. The Ga-68 that is created from the decay of Ge-68 is used as a PET isotope. Ga-71 has been used to study the behavior of solar neutrinos and it is also used in NMR studies.

Element Gallium - Ga

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

• Atomic Number: 31
• Group: 13
• Period: 4
• Series: Metals

1. Gallium (Ga) gal´e-um a chemical element, atomic number 31, atomic weight 69.72. (See Appendix 6.) gallium 67 a radioisotope of gallium, atomic mass 67, having a half-life.
2. Georgia Geis / Atomic Number 14 Bettyville is a great place to visit September 11, 2015 Books, caregiving caregiving, memoir Me and my Alice.
3. Gallium is a metal element. Its atomic number is 31, and its atomic weight is 69.72. On the periodic table, gallium is a member of Group 13. Although gallium is not present in pure form in nature, some ores that contain it are germanite and sphalerite. One application for gallium is in semiconductors.

Gallium's Name in Other Languages

• Latin: Gallium
• Czech: Gallium
• Croatian: Galij
• French: Gallium
• German: Gallium - r
• Italian: Gallio
• Norwegian: Gallium
• Portuguese: Gálio
• Russian: Галий
• Spanish: Galio
• Swedish: Gallium

Gallium Element

Atomic Structure of Gallium

• Atomic Radius: 1.81Å
• Atomic Volume: 11.8cm³/mol
• Covalent Radius: 1.26Å
• Cross Section (Thermal Neutron Capture)σ_a/barns: 2.9
• Crystal Structure: Orthorhombic
• Electron Configuration:

  1s² 2s²p⁶ 3s²p⁶d¹⁰ 4s²p¹

• Electrons per Energy Level: 2,8,18,3

  Shell Model
  

• Ionic Radius: 0.62Å
• Filling Orbital: 4p¹
• Number of Electrons (with no charge): 31
• Number of Neutrons (most common/stable nuclide): 39
• Number of Protons: 31
• Oxidation States: 3
• Valence Electrons: 4s²p¹

  Electron Dot Model
  

Chemical Properties of Gallium

• Electrochemical Equivalent: 0.8671g/amp-hr
• Electron Work Function: 4.2eV
• Electronegativity: 1.81 (Pauling); 1.82 (Allrod Rochow)
• Heat of Fusion: 5.59kJ/mol
• Incompatibilities:
• Ionization Potential
  • First: 5.999
  • Second: 20.51
  • Third: 30.71
• Valence Electron Potential (-eV): 69.7

Physical Properties of Gallium

• Atomic Mass Average: 69.723
• Boiling Point: 2676K 2403°C 4357°F
• Coefficient of lineal thermal expansion/K^-1: N/A
• Conductivity

  Electrical: 0.0678 10⁶/cm Ω
  Thermal: 0.406 W/cmK

• Density: 5.907g/cc @ 300K
• Description:

  Soft silver-white metal. Properties similar to aluminum.

• Elastic Modulus:
  • Rigidity: 6.67/GPa
  • Youngs: 9.81/GPa
• Enthalpy of Atomization: 276.1 kJ/mole @ 25°C
• Enthalpy of Fusion: 5.59 kJ/mole
• Enthalpy of Vaporization: 256.1 kJ/mole
• Flammablity Class:
• Freezing Point:see melting point
• Hardness Scale
  • Brinell: 60 MN m^-2
  • Mohs: 1.5
• Heat of Vaporization: 258.7kJ/mol
• Melting Point: 303.05K 29.9°C 85.8°F
• Molar Volume: 11.44 cm³/mole
• Physical State (at 20°C & 1atm): Solid
• Specific Heat: 0.37J/gK
• Vapor Pressure = 9.31E-36Pa@29.9°C

Regulatory / Health

• CAS Number
  • 7440-55-3
• RTECS: LW8600000
• 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: <0.08
  • Bone/p.p.m: n/a
  • Liver/p.p.m: 0.0025
  • Muscle/p.p.m: 0.0014
  • Daily Dietary Intake: n/a
  • Total Mass In Avg. 70kg human: <0.7mg

Who / Where / When / How

• Discoverer: Paul émile Lecoq de Boisbaudran
• Discovery Location: Paris France
• Discovery Year: 1875
• Name Origin:

  Latin: Gallia old name of France (Gaule).

• Abundance of Gallium:
  • Earth's Crust/p.p.m.: 18
  • Seawater/p.p.m.: 0.00003
  • Atmosphere/p.p.m.: N/A
  • Sun (Relative to H=1E¹²): 631
• Sources of Gallium:

  Found throughout the crust in minerals like bauxite, germanite and coal. Is produced as a by-product of zinc and copper refining. Around 30 tons per year are produced world wide.

• Uses of Gallium:

  Used in semiconductor production, quartz thermometers, laser diodes and used to locate tumors.

• Additional Notes:

  Coefficient of linear thermal expansion/K^-1: a axis 11.5E^-6; b axis 31.5E^-6; c axis 16.5E^-6

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Gallium Mass Number

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

Ga Atomic Number

• 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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How would you give the nuclear symbol for the isotope of gallium, Ga, that contains 40 neutrons per atom?

Gallium Atomic Symbol

1 Answer

Explanation:

In order to write the nuclear symbol of an isotope #'X'#, you need to know two things

Atomic Number And Mass Number Worksheet

• its atomic number - the number of protons it has in its nucleus
• its mass number - the numbe of protons and neutrons it has in its nucleus

In your case, you have to determine what the nuclear symbol will be for an isotope of gallium that contains #40#neutrons in its nucleus.

What Is Ga Atomic Number

The first thing to do here is take a look at a periodic table and make a note of gallium's atomic number.

Gallium is located in period 4, group 13 of the periodic table, and has an atomic number equal to #31#.

Since this isotope also has #40# neutrons in its nucleus, it follows that its mass number will be

#color(blue)('mass number' = A = 'no. of protons' + 'no. of neutrons')#

#A = 31 + 40 = 71#

Now, nuclear symbol notation must follow these rules

In your case, #A = 71# and #Z = 31#, so you have

#'_31^71'Ga' ->#gallium-71

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