Element 8 of Periodic table is
Oxygen with atomic number 8,
atomic weight 15.9994.
Oxygen, symbol O, has a
Base Centered Monoclinic structure and Colorless color.
Oxygen is a other nonmetal element.
Trivial name of Oxygen is chalcogens*.
Know everything about Oxygen Facts, Physical Properties, Chemical
Properties, Electronic configuration, Atomic and Crystal Structure.
Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetal and oxidizing agent that readily forms compounds (notably oxides) with most elements. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium.
Read key information and facts about element Oxygen
Explore our interactive periodic table
Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of
The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and
ends at bottom right (atomic number 118). Therefore you can directly look for atomic number
8 to find Oxygen on periodic table.
Another way to read periodic table and locate an element is by using group number (column)
and period number (row). To locate Oxygen on periodic
table look for cross section of group 16 and period
2 in the modern periodic table.
Interactive Periodic Table to Understand
and Learn Cool Trends
The element Oxygen was discovered by Carl Wilhelm Scheele in year
1774 in Sweden and United Kingdom
derived its name from the Greek word oxy-, both 'sharp' and 'acid', and -gen, meaning 'acid-forming'
The table below shows the abundance of Oxygen in Universe, Sun, Meteorites,
Earth's Crust, Oceans and Human Body.
The solid state structure of Oxygen is Base Centered Monoclinic.
The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in
dimensional space to form the structure.
The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell
Lattice Constants (a, b and c)
and the angles between them Lattice Angles (alpha, beta and gamma).
The positions of the atoms inside the unit cell are described by the set of atomic positions (
xi, yi, zi) measured from a reference lattice point.
The symmetry properties of the crystal are described by the concept of space groups. All possible
symmetric arrangements of particles in three-dimensional space are described by the 230 space groups
(219 distinct types, or 230 if chiral copies are considered distinct.
Oxygen atoms have 8 electrons and
the electronic shell structure is [2, 6] with Atomic Term Symbol (Quantum Numbers) 3P2.
Shell Structure of Oxygen - Electrons per energy
The ground state electronic configuration of Neutral Oxygen atom is
[He] 2s2 2p4.
The portion of Oxygen configuration that is equivalent to the noble gas of
the preceding period, is abbreviated as [He]. For atoms with many electrons, this
notation can become lengthy and so an abbreviated notation is used.This is important as it is
the Valence electrons 2s2 2p4, electrons in
the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Oxygen atom, Unabbreviated electronic configuration
1s2 2s2 2p4
Oxygen atomic radius is 48 pm, while it's covalent radius is 73 pm.
The electron affinity of Oxygen is 141 kJ/mol
Refer to table below for Ionization energies of Oxygen
Refer to below table for Oxygen Physical Properties
Oxygen is N/A of electricity. Refer to
below for the Electrical properties of Oxygen
Refer to table below for Thermal properties of Oxygen
Isotopes of rhodium. Naturally occurring Oxygen has
3 stable isotope -
16O, 17O, 18O.
List of unique identifiers to search the element in various chemical registry databases