Oxygen (atomic number 8, symbol O) is among the most abundant elements and 9 known isotopes. Air is made of 21% oxygen and 78% nitrogen. Silicon-oxygen minerals make most of the Earth's crust. Oxygen has cubic lattice structure and is paramagnetic in solid and liquid state. It is an odorless gas with a light blue color, which is soluble in water.
Oxygen is a gas and a non-metal. Non-metals are found in two states at room temperature - solids such as selenium and phosphorus and gases (e.g. nitrogen and oxygen). The element has 2 allotropes - ozone and diatomic form....Read More