| Element (Atom) Name | Oxygen |
| Symbol | O |
| Physical state at room temperature | Gas |
| Element Classification | Non-metal |
| Group Name | Chalcogen |
| Period Number (Periodic table) | 2 |
| Group number (Periodic table) | 16 |
| Atomic number | 8 |
| Atomic weight | 15.9994 (Ref: Jlab-ele008) 16.00 (Ref: Lanl-8) [15.999 03, 15.999 77] (Ref: ciaaw-oxygen, Nist-8) |
| Atomic Radius | 152 pm (Van der Waals) (Ref: Lanl-8) |
| Density | 0.001429 g/cm3. (Ref: Jlab-ele008) |
| Melting point | -218.79°C (Ref: Jlab-ele008, Lanl-8) |
| Boiling point | -182.95°C (Ref: Jlab-ele008) -182.96 °C (Ref: Lanl-8) |
| Electron shell configuration | 1s2 2s2 2p4 |
| Oxidation States | -2 (Ref: Jlab-ele008) 2, 1, −1, −2 (Ref: Lanl-8) |
| Ionization Energy | 13.618 eV (Ref: Jlab-ele008) 13.618055 eV (Ref: Nist-8) |
| Number of Stable Isotopes | 3 |
| InChI | InChI=1S/O (Ref: Pubchem-8) |
| InChI Key | QVGXLLKOCUKJST-UHFFFAOYSA-N (Ref: Pubchem-8) |
| Remarks |
REFERENCES
- Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
- Lanl-8: https://periodic.lanl.gov/8.shtml
- ciaaw-oxygen: https://www.ciaaw.org/oxygen.htm
- Nist-8 : https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=8
- Pubchem-8: https://pubchem.ncbi.nlm.nih.gov/element/8
- science.co.il: https://www.science.co.il/elements/
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