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- Oxygen - Wikipedia
Oxygen is a chemical element; it has the symbol O and its atomic number is 8 It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and a potent oxidizing agent that readily forms oxides with most elements as well as with other compounds Oxygen is the most abundant element in Earth's crust, making up almost half of the Earth's crust in the form of various
- Solid oxygen - Wikipedia
Solid oxygen O 2, like liquid oxygen, is a clear substance with a light sky-blue color caused by absorption in the red part of the visible light spectrum Oxygen molecules have a relationship between the molecular magnetization and crystal structures, electronic structures, and superconductivity
- Triplet oxygen - Wikipedia
Triplet oxygen, 3 O 2, refers to the S = 1 electronic ground state of molecular oxygen (dioxygen) Molecules of triplet oxygen contain two unpaired electrons, making triplet oxygen an unusual example of a stable and commonly encountered diradical: [2] it is more stable as a triplet than a singlet
- Singlet oxygen - Wikipedia
Singlet oxygen, systematically named dioxygen (singlet) and dioxidene, is a gaseous inorganic chemical with two oxygen atoms in a quantum state where all electrons are spin-paired, known as a singlet state It is the lowest excited state of the diatomic oxygen molecule, which in general has the chemical structure O=O and chemical formula O 2
- Allotropes of oxygen - Wikipedia
Singlet oxygen is the common name used for the two metastable states of molecular oxygen (O2) with higher energy than the ground state triplet oxygen Because of the differences in their electron shells, singlet oxygen has different chemical and physical properties than triplet oxygen, including absorbing and emitting light at different wavelengths It can be generated in a photosensitized
- Isotopes of oxygen - Wikipedia
O and 18 O can be measurably higher Furthermore, the 17 O (n,α) 14 C reaction is a further undesirable result of an elevated concentration of heavier isotopes of oxygen Therefore, facilities which remove tritium from heavy water used in nuclear reactors often also remove or at least reduce the amount of heavier isotopes of oxygen
- Oxygen compounds - Wikipedia
Water (H 2O) is the oxide of hydrogen and most familiar oxygen compound Its bulk properties partly result from the interaction of its component atoms, oxygen and hydrogen, with atoms of nearby water molecules Hydrogen atoms are covalently bonded to oxygen in a water molecule but also have an additional attraction (about 23 3 kJ·mol −1 per hydrogen atom) to an adjacent oxygen atom in a
- Chemical structure - Wikipedia
A chemical structure of a molecule is a spatial arrangement of its atoms and their chemical bonds Its determination includes a chemist 's specifying the molecular geometry and, when feasible and necessary, the electronic structure of the target molecule or other solid
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