PLS help
Given Scandium +5, make a proper ionic bond with oxygen.
a
Sc5O2
b
ScO
c
Sc5O
d
Sc2O5

Sc2O5

Explanation:

We must first consider the relative valencies of the elements. Recall that the formulae of the compound must involve an exchange in the valencies of the two combining species. Hence the first step in solving the problem must be to put down the individual valencies of the both elements then exchange thief valencies to obtain the actual formula of the compound formed by a combination of the both species as we shall show below;

Oxygen=2

Scandium= 5

When the both exchange their valencies

Scandium= 2

Oxygen=5

Hence the formula of the compound will be Sc2O5

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

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