Oxygen Atomic Number

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Element Oxygen - O

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

Name: Oxygen: Symbol: O Atomic Number: 8: Atomic Mass: 15.999 atomic mass units: Number of Protons: 8: Number of Neutrons: 8: Number of Electrons: 8: Melting Point. Atomic Number of Oxygen Atomic Number of Oxygen is 8. Chemical symbol for Oxygen is O. Number of protons in Oxygen is 8. Atomic weight of Oxygen is 15.999 u or g/mol. Melting point of Oxygen is -218,4 °C and its the boiling point is -182,9 °C. Oxygen is the element with atomic number 8 and element symbol O. Under ordinary conditions, it can exist as a pure element in the form of oxygen gas (O 2) and also ozone (O 3). Here is a collection of facts about this essential element. While oxygen is a colorless gas under ordinary conditions, element 8 is actually quite colorful!

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Overview of Oxygen

  • Atomic Number: 8
  • Group: 16
  • Period: 2
  • Series: Nonmetals

Oxygen's Name in Other Languages

  • Latin: Oxygenium
  • Czech: Kyslík
  • Croatian: Kisik
  • French: oxygène
  • German: Sauerstoff - r
  • Italian: Ossigeno
  • Norwegian: Oksygen
  • Portuguese: Oxigênio
  • Russian: Кислород
  • Spanish: Oxígeno
  • Swedish: Syre

Atomic Structure of Oxygen

  • Atomic Radius: 0.65Å
  • Atomic Volume: 14cm3/mol
  • Covalent Radius: 0.73Å
  • Cross Section (Thermal Neutron Capture) σa/barns: 0.00019
  • Crystal Structure: Cubic
  • Electron Configuration:
    1s2 2s2p4
  • Electrons per Energy Level: 2,6
    Shell Model
  • Ionic Radius: 1.4Å
  • Filling Orbital: 2p4
  • Number of Electrons (with no charge): 8
  • Number of Neutrons (most common/stable nuclide): 8
  • Number of Protons: 8
  • Oxidation States:-2,-1
  • Valence Electrons: 2s2p4
    Electron Dot Model

Chemical Properties of Oxygen

  • Electrochemical Equivalent: 0.29847g/amp-hr
  • Electron Work Function:
  • Electronegativity: 3.44 (Pauling); 3.5 (Allrod Rochow)
  • Heat of Fusion: 0.22259kJ/mol
  • Incompatibilities:
    oxidizable materials
  • Ionization Potential
    • First: 13.618
    • Second: 35.117
    • Third: 54.934
  • Valence Electron Potential (-eV): -20.6

Physical Properties of Oxygen

  • Atomic Mass Average: 15.9994
  • Boiling Point: 90.33K -182.82°C -297.08°F
  • Coefficient of lineal thermal expansion/K-1: N/A
  • Conductivity
    Electrical:
    Thermal: 0.0002674 W/cmK
  • Density: 1.429g/L @ 273K & 1atm
  • Description:
    Colorless, odorless, tasteless gas
  • Enthalpy of Atomization: 249.4 kJ/mole @ 25°C
  • Enthalpy of Fusion: 0.22 kJ/mole
  • Enthalpy of Vaporization: 3.41 kJ/mole
  • Flammablity Class: Non-flammable gas (Oxidizer)
  • Freezing Point:see melting point
  • Heat of Vaporization: 3.4099kJ/mol
  • Melting Point: 50.5K -222.65°C -368.77°F
  • Molar Volume: 14 cm3/mole
  • Optical Refractive Index: 1.000271 (gas) 1.221 (liquid)
  • Physical State (at 20°C & 1atm): Gas
  • Specific Heat: 0.92J/gK

Regulatory / Health

  • CAS Number
    • 7782-44-7
  • NFPA 704
    • Health:
    • Fire:
    • Reactivity:
    • Special Hazard: OxidizerOSHAPermissible 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: constituent of water
      • Bone/p.p.m: 285000
      • Liver/p.p.m: 160000
      • Muscle/p.p.m: 160000
      • Daily Dietary Intake: mainly water
      • Total Mass In Avg. 70kg human: 43 kg (mainly water)

    Who / Where / When / How

    • Discoverer: Joseph Priestley, Carl Wilhelm Scheele
    • Discovery Location: Leeds England (Priestley)/Uppsala Sweden (Scheele)
    • Discovery Year: 1774
    • Name Origin:
      Greek: oxus (acid) and gennan (generate).
    • Abundance of Oxygen:
      • Earth's Crust/p.p.m.: 474000
      • Seawater/p.p.m.: N/A
      • Atmosphere/p.p.m.: 209500
      • Sun (Relative to H=1E12): N/A
    • Sources of Oxygen:
      Obtained primarily from by liquification and then fractional distillation of the air. Annual world wide production is around 100,000,000 tons.
    • Uses of Oxygen:
      Forms almost 21% of atmosphere. Used in steel making, welding, water purification, cement. It is also required for supporting life and combustion.
    • Additional Notes:
      Oxygen is the most abundant element on the surface of the earth.

    Oxygen Menu

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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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The Element Oxygen

[Click for Isotope Data]

Atomic Number: 8 Sdformatter for mac.

Atomic Weight: 15.9994

Melting Point: 54.36 K (-218.79°C or -361.82°F)

Boiling Point: 90.20 K (-182.95°C or -297.31°F)

Density: 0.001429 grams per cubic centimeter

Phase at Room Temperature: Gas

Element Classification: Non-metal

Period Number: 2

Group Number: 16

Group Name: Chalcogen

What's in a name? From the greek words oxys and genes, which together mean 'acid forming.'

Say what? Oxygen is pronounced as OK-si-jen.

History and Uses: Konica minolta drivers for mac os x.

Oxygen had been produced by several chemists prior to its discovery in 1774, but they failed to recognize it as a distinct element. Joseph Priestley and Carl Wilhelm Scheele both independently discovered oxygen, but Priestly is usually given credit for the discovery. They were both able to produce oxygen by heating mercuric oxide (HgO). Priestley called the gas produced in his experiments 'dephlogisticated air' and Scheele called his 'fire air'. The name oxygen was created by Antoine Lavoisier who incorrectly believed that oxygen was necessary to form all acids.

Oxygen is the third most abundant element in the universe and makes up nearly 21% of the earth's atmosphere. Oxygen accounts for nearly half of the mass of the earth's crust, two thirds of the mass of the human body and nine tenths of the mass of water. Large amounts of oxygen can be extracted from liquefied air through a process known as fractional distillation. Oxygen can also be produced through the electrolysis of water or by heating potassium chlorate (KClO3).

Oxygen is a highly reactive element and is capable of combining with most other elements. It is required by most living organisms and for most forms of combustion. Impurities in molten pig iron are burned away with streams of high pressure oxygen to produce steel. Oxygen can also be combined with acetylene (C2H2) to produce an extremely hot flame used for welding. Liquid oxygen, when combined with liquid hydrogen, makes an excellent rocket fuel. Ozone (O3) forms a thin, protective layer around the earth that shields the surface from the sun's ultraviolet radiation. Oxygen is also a component of hundreds of thousands of organic compounds.

Oxygen Atomic Weight

Estimated Crustal Abundance: 4.61×105 milligrams per kilogram

Oxygen atomic number and mass

Estimated Oceanic Abundance: 8.57×105 milligrams per liter

Number of Stable Isotopes: 3 (View all isotope data)

Ionization Energy: 13.618 eV

Oxidation States: -2

Oxygen Atomic Number

Core audio drivers for mac. Electron Shell Configuration:

1s2

2s2 2p4

What Is Atomic Oxygen

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