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Author Topic: Edexcel CHEMISTRY DOUBTS!!!!  (Read 253624 times)

Offline Darth Austrakast

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #345 on: June 07, 2010, 03:06:48 am »
the melting or boiling pt first increase for metals This is cuz the metallic bonding between the increasingly postive charged cation ie Na+1 Mg+2 Al+3 is stronger so more energy is needed to simultaneously break all the bonds

the melting temperature is highest for silicon as it exist as giant covalent structure -- You have to break a large amount of strong covalent bonds before it will melt or boil.

Phosphorus, sulphur, chlorine and argon are simple molecular substances with only van der Waals attractions between the molecules. Their melting or boiling points will be lower than those of the first four members of the period which have giant structures.
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Offline Ibiza279

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #346 on: June 07, 2010, 06:43:55 am »
hey,the chem guide says that tertiary are the slowest, the fastest are the primary ones :o
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Offline Meticulous

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #347 on: June 07, 2010, 06:47:50 am »
Quote from: Ibiza279 on June 07, 2010, 06:43:55 am
hey,the chem guide says that tertiary are the slowest, the fastest are the primary ones :o

Wrong..

Tertiary fastest
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Offline abuelzouz

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #348 on: June 07, 2010, 07:01:04 am »
there r some mistakes in the guide
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Offline Darth Austrakast

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #349 on: June 07, 2010, 10:27:35 am »
the chem guide sin chemguide.com?
they do say tertiary is fastest ! 8)

By the way How was the chem xam??
24 hours have not passed and we r nt allowed to discuss the xams
I'll just say mine was okay--made some silly errors but overall its was okay and easier than expected
Hopes bio unit 2 will be just as easy 
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #350 on: June 07, 2010, 10:37:50 am »
it was good
sum confusin q but overall good
yeh hope bio is good as well
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Offline Meticulous

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #351 on: June 07, 2010, 11:28:09 am »
Quote from: kim on June 07, 2010, 10:37:50 am
it was good
sum confusin q but overall good
yeh hope bio is good as well

It was perfect alhamdulilah!

Everybody-NO DISCUSSIONS UNTIL 24 HOURS HAVE PASSED!
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Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #352 on: June 07, 2010, 11:35:19 am »
Quote from: Steven Gerrard-A.F on June 07, 2010, 11:28:09 am
It was perfect alhamdulilah!

Everybody-NO DISCUSSIONS UNTIL 24 HOURS HAVE PASSED!

Alhamdulillah it went good ......

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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #353 on: June 07, 2010, 11:41:22 am »
Quote from: Steven Gerrard-A.F on June 07, 2010, 11:28:09 am
It was perfect alhamdulilah!

Everybody-NO DISCUSSIONS UNTIL 24 HOURS HAVE PASSED!

haha good for u
mine wasnt perfect lol
ok
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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.

Offline Uchia

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #354 on: June 07, 2010, 12:06:06 pm »
mine was ok to ahmaduila the paper went well but i didn't like those calculation questions but overall hamduila hoping for a decent high A
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Offline Uchia

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #355 on: June 07, 2010, 12:10:20 pm »
inshallah bio 2 tommorow will also be easy =)
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #356 on: June 07, 2010, 12:22:39 pm »
Quote from: damlaj on June 07, 2010, 12:10:20 pm
inshallah bio 2 tommorow will also be easy =)

inshallah it will
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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.

Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #357 on: June 07, 2010, 12:44:23 pm »
Quote from: kim on June 07, 2010, 12:22:39 pm
inshallah it will


best of luck to all bio students
By the way i dont take it :P

how was ur other bio papers???
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Offline Darth Austrakast

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #358 on: June 07, 2010, 01:55:41 pm »
Bio unit 1 and 7 were consistent with past question papers tho de made it rilly lenghty and intoduced some tricky questions----bio unit 1 was loaded wid graphs and statistical analysis  :P :P :P

hey thanx for the wish!
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Offline abuelzouz

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #359 on: June 07, 2010, 04:46:25 pm »
chem was gd! except 1 ques. im nt sure of!
hope bio iz gd 2! i did gd in unit 3 :)
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