Oxygen is a chemical element – a substance that has only one type of atom. Its main chemical symbol is O, and also its atomic number is 8, which indicates that an oxygen atom has actually eight prolots in its nucleus. Oxygen is a gas at room temperature and also has actually no colour, smell or taste. Oxygen is uncovered naturally as a molecule. Two oxygen atoms strongly bind along with a covalent double bond to develop dioxygen or O2.

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Ozone is another create of pure oxygen. It forms in the Earth’s stratospright here. Ultraviolet light (UV) splits O2 molecules into single oxygen atoms. The single oxygen atoms latch onto O2 molecules to develop O3 (the chemical formula for ozone). The stratosphere has better concentrations of O3 because tbelow is more UV existing. The ozone layer filters out UV, which reduces the opportunity to separation O2 molecules in the reduced atmosphere (troposphere), wbelow we live. Ozone deserve to still create in the troposphere as soon as O2 is put under high warm and push. Car engines have actually the appropriate problems to produce ozone, which is a toxin, so modern-day cars use catalytic converters to convert O3 back to O2.

Liquid oxygen and solid oxygen

When oxygen is cooresulted in -183℃, it becomes a liquid. Liquid oxygen is provided as a propellant for rockets – consisting of the Rocket Lab’s Electron rocket. Oxygen becomes solid at temperatures below -218.79℃. In both its liquid and solid claims, the substances are clear through a light sky-blue colour.


Oxygen is everywhere!

It is the third the majority of abundant element in the cosmos after hydrogen and helium. It is the most numerous facet by mass in the Earth’s crust. Oxygen forms compounds with silicon and other atoms to develop minerals like quartz and also sand. Oxygen likewise makes up a lot of of Earth’s oceans by mass. A water molecule (H2O) is made up of two hydrogen atoms and also one oxygen atom. Although there are even more hydrogen atoms in water, hydrogen has less mass. By mass, water is composed of virtually 90% oxygen. It is the many abundant element in the human body (by mass) bereason our bodies are 70% water.

Oxygen implies life

Oxygen is necessary for life. Most living points usage oxygen for cellular respiration – the process by which cells acquire power. Humans and various other land also pets breathe oxygen (as part of air) right into lungs. Here it is absorbed into the blood and also brought to the body’s cells. Fish use gills to attain dissolved oxygen from the water. Insects get their oxygen through little external openings called spiracles, which lead right into a network-related of tubes called trachea.

Plants also use oxygen for cellular respiration. In a separate procedure – photosynthesis – plants take in carbon dioxide and also provide out oxygen. In low light, the photosynthesis price is less than the respiration rate. In bideal light, the photosynthesis rate is higher than the respiration rate and even more oxygen is produced than provided. The excess oxygen is released right into the setting.

Words we use eextremely day have the right to have different interpretations in science. ‘Respiration’ is typically offered to mean breathing – the inhalation and exhalation of air. In biology, cellular respiration describes the chemical reactions in cells that release power from food. It is essential to talk about words choose respiration to protect against misconceptions. 


Oxygen, by itself, does not burn, but it is necessary for combustion. Oxygen is among the 3 components of the fire triangle. Fuel and heat are the various other two components. Heat created by the fuel sustains the fire. As lengthy as there is enough fuel and also oxygen, a fire will proceed to burn. Water-based fire extinguishers occupational by rerelocating heat from the fire. Carbon dioxide and also dry chemical extinguishers occupational by smothering the fire – cutting off the supply of oxygen.

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