hihi!

im so distacted=/. my bro is playing elan! nb! grr...so i decided to blog=D.
i really suck at chem! sigh...finally understand oxidation>.<".

* Oxidation describes the loss of electrons by a molecule, atom or ion
* Reduction describes the gain of electrons by a molecule, atom or ion

However, these descriptions (though sufficient for many purposes) are not truly correct. Oxidation and reduction properly refer to a change in oxidation number — the actual transfer of electrons may never occur. Thus, oxidation is better defined as an increase in oxidation number, and reduction as a decrease in oxidation number. In practice, the transfer of electrons will always cause a change in oxidation number, but there are many reactions which are classed as "redox" even though no electron transfer occurs (such as those involving covalent bonds).

http://en.wikipedia.org/wiki/Redox

Mrs Singh didnt say there is no electron transfer when it is covalent bond!!! got me confused for so long! sigh...i feel dumb...maybe i am.

still got contact process, haber process, organic chemistry, extraction of metals, reactivity series and solubility table. wah! didnt realise got so much>.<" AHHHHHHHHHHHHHHHHHHHHHHHH!!! im freakin out! ok! bye!