Chemisty Gcse Revision

[Skweeky]

no Bo, I didn't mean the periodic table, I meant another one. It's a small one and it gives you an overview of possible compounds and how they are built

[TRshady]

lol, good advice proper bo and I agree, too much times I've done just that, skimming through a whole revision guide, cramming it all in while names are being called in and then sitting down and thinking to yourself "damn ... whats my name?"

Thanks for the replies ... im slowly getting it, keep better explanations coming though, then I'll write an updated definition which I hopefully undertand.

Edit:

Thanks for the fast replies! ...finding it hard to keep up, lol.
I'm able to balance equatoins and that bite size quote certainly has helped, any chance you could explain the thing about the proportional weight part of the compound definition.

[Gemby!]

i have just had my science exam

wasnt too hard - but now i have said that i have probably done bad

are you doing a higher paper ?

[TRshady]

Good luck with the results, and yeah, I'm doing higher I'm supposedly "gifted and talented" ... but dont see that much proff of it in me. Though I got 666 in stats in year 6 and have always got top marks in school, it seems all my knowledge is being replaced by what Im learning in web design, if only I could purchase more brain ram, that'll be here in future though, watch this space ... lol.

[Proper Bo]

Originally posted by TRshady@10 December 2003 - 15:22
any chance you could explain the thing about the proportional weight part of the compound definition.

no, sorry

Elements and Compounds
Here are some need-to-know facts about elements and compounds.

There are just over 100 elements. You can find them all in the Periodic Table.
Each element is made of one substance only - the element itself.
There are millions of different compounds.
Compounds are made of different elements joined together.
Compounds are nothing like the elements that they are made from.
The names of some compounds show what they are made of, others are more difficult.

You know how to get the names of the compounds from the elements?
eg
Zinc + Oxygen -------> Zinc Oxide
Iron + Chlorine-------> Iron Chloride
Hydrogen + Sulphur -------->Hydrogen Sulphate
Magnesium + Bromine ------->Magnesium Bromide
etc

[Gemby!]

i done higher - it doesnt ask you anything about compounds and that its more of the balanced equations and waves and stuff like that

well mine was anyway

im only good at biology

ooo my brainy stuff is being replaced my my luv for tv and computer and sleep and food and ooo perdy budderfly ....

[TRshady]

Thanks proper bo, and I do know how to get names of the elements from compounds, I feel pretty confident in this, just though I had it all covered mum comes in, im all smiling and she asks ... "whats a compound then?" ...
Made me think that something which would seem so important, I stumbled on.

Edit: - oh maybe you could help here then gemby.
I take it these appeared in the tests you had? (have you done both papers yet or just the first?) ... the following is what we've been told:

paper 1
Chemical Econonmics
Periodic Table
Chemisty
Balance symbol equations
Factors that effect rate of reaction
Different types of reaction eg. oxidation
Exothermic and endorthermic, bond breaking, making etc
Structure of atoms and ions

What scares me is those 6 mark (sometimes higher) questions which if you dont know, can really effect the final mark.

[Proper Bo]

Originally posted by gemby!@10 December 2003 - 15:29
i done higher - it doesnt ask you anything about compounds and that its more of the balanced equations and waves and stuff like that

He'll have a different paper to you Gemby, if they're on different days, they're different papers.
Try This TR

[Gemby!]

i think my teachers make them up anyway !

i done modules 1-8 by the way so Trshady might have same stuff as me B)

[Rat Faced]

Definite proportions or multiple proportions?