anonymous
  • anonymous
how to tell whether an element is paramagnetic or diamagnetic
Chemistry
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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anonymous
  • anonymous
simply by counting their electron if it is even then it is daimagnetic if it is odd then paramagnetic its a trick but here O2 is xception it is paramagnetic
anonymous
  • anonymous
Do you know molecular orbital theory? We use it is to see if an element is paramagnetic or dia magnetic well odd electron species are always paramagnetic but you can decide for even numbers only by using MOT...
anonymous
  • anonymous
Write the orbitals in MOT and fill them up ans see if there are unpaired electrons if there are it is paramagnetic if not then it is diamagnetic.

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anonymous
  • anonymous
i told its a trick not ans
anonymous
  • anonymous
Whatever, i just told the ans :P
anonymous
  • anonymous
but if we have to distinguish between paramagnetic and diamagnetic oxide then?
anonymous
  • anonymous
Could you give an example?
anonymous
  • anonymous
between Na2o, MgO, BeO
anonymous
  • anonymous
Take the ion O2- and use MOT it has 18 electrons.
anonymous
  • anonymous
so why you are not considering electrons in Na and Mg
anonymous
  • anonymous
Good question i'm not sure :D
anonymous
  • anonymous
Thats an ionic bond between Na+ and O- even if you want to consider Na+ you would consider it seperately. Generally i would think you consider the O2-, I;ve not heard of paramagnetic cations...
anonymous
  • anonymous
ok
anonymous
  • anonymous
well if u are doing ques of oxide as well u have to use MOT by which u can identify and u can use trick but dont use in theoretical xam if u are giving compound or oxide all u have to do is count electrons ok even in oxide same rule is followed.. here u cant convert in ions there is no sense to do so.. in ques they dont as individualy if they give oxide den y r u doing so
anonymous
  • anonymous
Well Na2O is an ion isn't it? If O2- is paramagnetic then naturally the entire compound would be diamangnetic.
anonymous
  • anonymous
Heena i did not get what you are trying to say...
anonymous
  • anonymous
O2- is exception wen u rite it by using MOT u ll find that
anonymous
  • anonymous
and Na2O is not ion
anonymous
  • anonymous
How is O2- is an exception? Na2O magnetic behaviour can be attributed to O2- ion.
anonymous
  • anonymous
srrry O2- is not the xception O2 is exception..
anonymous
  • anonymous
By MOT even O2 is no exception there are two unpaired electrons in the pi* orbitals which lend it a para magnetic charcter.
anonymous
  • anonymous
i agree wat u saying but i m telling the exception acc. to the trick sir..dat i told her
anonymous
  • anonymous
For heavens sake please stop using sir.... :D

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