Edexcel CHEMISTRY DOUBTS!!!!

[The Golden Girl =D]

Shukran my arabic teacher.

Al Afu =]

[Uchia]

edexcel new specimen

question 18

c)  iii

plz

[The Golden Girl =D]

sorry but which unit ?

[Uchia]

unit 4

[elemis]

unit 4

What year, man ?

EDIT : Post a link to the file, please.

[guMnam]

Green
and
Monoclinic - I guess  

When I made it in school I got needle shaped crystals

Thanks i got needle too

[Uchia]

can anyone explain to me how can we use the mass spectrometer in identifying a compound using the chart itself the one with peaks asap plz

[Amii]

Thanks i got needle too

No problem 

[Amii]

can anyone explain to me how can we use the mass spectrometer in identifying a compound using the chart itself the one with peaks asap plz

http://www.chemguide.co.uk/analysis/masspec/fragment.html
http://www.knockhardy.org.uk/sci_htm_files/08msintr.pdf
http://www.knockhardy.org.uk/sci_htm_files/08irintr.pdf

Check these sites out - It might help 

[blackberry]

hey does nyone know the difference between quantum shells, orbitals and subshells???

textbook said that quantum shell is the region around the nucleus in which an electron is found
another textbook said that orbital is the region where an electron is most likely to be found and subshells are regions of differing energy within a shell, described by the letters s,p,d,f etc..

[The Golden Girl =D]

hey does nyone know the difference between quantum shells, orbitals and subshells???

textbook said that quantum shell is the region around the nucleus in which an electron is found
another textbook said that orbital is the region where an electron is most likely to be found and subshells are regions of differing energy within a shell, described by the letters s,p,d,f etc..

I explained them In the Form of Pictures , I hope My Info is right tho :S


Sorry but in the first picture the Circle that is furthest from the nucleus has only 1 electron ,and the circle around Na -the small one - isn't supposed to be there -.-

P.S. Wrote it Dow In a Hurry .

[~ Miss Relina ~]

anyone plz give me the practicals for unit 1 neeeeeeded urgently...

[The Golden Girl =D]

I Hope This Helps :

http://www.2dix.com/pdf-2010/as-edexcel-chemistry-practicals-pdf.php

[blackberry]

  ooo sorry i shudve been more clear, actually i didnt really understand their positions in an atom!!! but i got it now!!
thanks for helping out!! ive attached a diagram of what i understood is a shell,subshell and orbital.

[elemis]

ooo sorry i shudve been more clear, actually i didnt really understand their positions in an atom!!! but i got it now!!
thanks for helping out!! ive attached a diagram of what i understood is a shell,subshell and orbital.

You have to understand that each quantum shell contains electron orbitals which are fuzzy areas where an electron has a high probability of being found.

These cant be drawn as 2-D shapes.