Question

How many unpaired electrons would you expect on aluminum in aluminum oxide? How many unpaired electrons...

How many unpaired electrons would you expect on aluminum in aluminum oxide?

How many unpaired electrons would you expect on iron in iron (II) sulfide?

How many unpaired electrons would you expect on vanadium in V2O3?

How many unpaired electrons would you expect on iron in [Fe(H2O)6] 3+ ?

Explain the method also.

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Answer #1

Al2O3      Al+3 O-2

Al = 13 1s22s22p63s23p1

Al-3e- ----> Al+3

13e-          10e- 1s22s22p6 no unpaired electrons

FeS   Fe+2 S-2

Fe = 26 1s22s22p63s23p64s23d6

Fe-2e- ----> Fe+2

26e-          24e- 1s22s22p63s23p64s23d4 four unpaired electrons

V2O3   V+3 o2-

V = 23 1s22s22p63s23p64s23d3

V-3e- ------. V+3

23e-    20e-1s22s22p63s23p63d2 two unpaired electrons in 3d

[Fe(H2O)6] 3+   Fe+3

Fe = 26 1s22s22p63s23p64s23d6

Fe-3e------> Fe+3

26e-          23e- 1s22s22p63s23p63d5 five unpaired electrons in 3d

     

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