súrefnisatónum
Súrefnisatóm is the Icelandic word for an oxygen atom. An oxygen atom is a chemical element with the symbol O and atomic number 8. Oxygen is a member of the chalcogen group in the periodic table, and it is the most abundant element in the Earth's crust and the third most abundant element in the universe. Oxygen atoms are highly reactive and readily form compounds with most other elements.
In its elemental form, oxygen exists as a diatomic molecule, O2, which is a colorless, odorless gas
The atomic structure of an oxygen atom includes a nucleus containing 8 protons and typically 8 neutrons,