Qualification > Sciences

PHYSICS, CHEM HELP NEEDED

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nid404:
the symbol ?, meaning "minus or plus", used alongside the plus-minus sign to show that a negative value is to be taken where the positive value is indicated by the plus-minus sign, and vice versa (as in (x ± 1) / (x ? 2), which means (x + 1) / (x - 2) and (x - 1) / (x + 2)).

Hope that helped :)

godfather93:
thanks for that! :D i had the same logic in mind but somehow in formula derivations, it doesn't seem to work that way! :(

nid404:
put up a sample...I'll check it out

godfather93:
i'll put up the sample later.

Right now, I have a more important and tricky question --

Is chemistry as a subject a completely  theoretical subject???

U may think as to why i'm asking that but have u ever wondered, for example, why the number of electrons in the outermost shell is 8? I mean there is no clear cut evidence saying so, is there?

nid404:
Yes there is and it's a lil difficult to explain....
Check http://www.knockhardy.org.uk/ppoints.htm - electronic configuration

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