Oxygen, Chemistry

OXYGEN

Oxygen is the second most electronegative substance after fluorine, and forms thermodynamically stable compounds with usually all elements. It rivals fluorine in the ability to stabilize the biggest known oxidation states of many elements, as where there is no corresponding fluoride being and OsVIIIO4. Oxidation reactions with O2 are usually slow because of the strength of the O=O double bond (490 kJ mol-1).

 

Oxygen is the most abundant substance on Earth, making around 46% of the Earth's crust by mass. The commonest minerals are complex oxides such as carbonates and silicates. Oxygen is also a constituent of water, and of usually all biological molecules. Atmospheric O2 collects almost entirely from photosynthesis by green plants, and is not found on other known planets. Reactions involving dioxygen, both in respiration and in photosynthesis by air-breathing animals, are important for biological chemistry.

Oxygen may be extracted from the atmosphere by fractional and liquefaction distillation. The liquid boils at 90 K and is dangerous when collide with combustible materials. The compressed gas is used in the liquid and metallurgy as an oxidizer for rocket propulsion.

 

Posted Date: 7/23/2012 7:06:43 AM | Location : United States







Related Discussions:- Oxygen, Assignment Help, Ask Question on Oxygen, Get Answer, Expert's Help, Oxygen Discussions

Write discussion on Oxygen
Your posts are moderated
Related Questions

Examples for the compound which is both doublesalt and complex compound? Ans) A Compound that is double salt cannot be a complex compound.

Radioanalytical methods: Radioanalytical methods using radiotracers and activation analysis are more sensitive and specific because of ease of detection of nuclear radiation.


The electronic configuration of an element is  1s 2 , 2s 2 2p 6 3s 2 3p 6 3d 5 4s 1 . This represents its: (1) Excited state (2) Ground state        (3)Cationic for

Verify the transfer function C(s)/R(s) for the block diagram given below.

#question:although CO is well known,why doesn''t SiO exist under normal conditions?

Strategy 1 Wheat flour F 3940 g is, mixed with 60g of A, B and C, yielding a ratio of chemicals to flour of 3:197 in all formulations. All mixtures are produced in total amoun

When is fresh produce to harvest? Optimum quality of fruits and vegetables is obtained only when they are harvested at the optimal stage of maturity. A critical time for

bohr model for hydrogen atom?