Question

how to tell whether an element is paramagnetic or diamagnetic

Answer 1

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

Answer 2

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...

Answer 3

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.

Answer 4

i told its a trick not ans

Answer 5

Whatever, i just told the ans :P

Answer 6

but if we have to distinguish between paramagnetic and diamagnetic oxide then?

Answer 7

Could you give an example?

Answer 8

between Na2o, MgO, BeO

Answer 9

Take the ion O2- and use MOT it has 18 electrons.

Answer 10

so why you are not considering electrons in Na and Mg

Answer 11

Good question i'm not sure :D

Answer 12

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...

Answer 13

ok

Answer 14

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

Answer 15

Well Na2O is an ion isn't it? If O2- is paramagnetic then naturally the entire compound would be diamangnetic.

Answer 16

Heena i did not get what you are trying to say...

Answer 17

O2- is exception wen u rite it by using MOT u ll find that

Answer 18

and Na2O is not ion

Answer 19

How is O2- is an exception? Na2O magnetic behaviour can be attributed to O2- ion.

Answer 20

srrry O2- is not the xception O2 is exception..

Answer 21

By MOT even O2 is no exception there are two unpaired electrons in the pi* orbitals which lend it a para magnetic charcter.

Answer 22

i agree wat u saying but i m telling the exception acc. to the trick sir..dat i told her

Answer 23

For heavens sake please stop using sir.... :D