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Using the perodic table, perdict the fo...

Using the perodic table, perdict the formulas of compounds which might be formed by the following pairs of elements : (a) silicon and bromine (b) aluminium and sulphur.

Text Solution

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(a) Silicon belong to group 14.It has four valence electrons and hence its valence =4 . Bromine belongs to group 17. It has seven valence electrons and hence its valence =8-7 =1
therefore the formula of the compound formed would be

(b) Aluminium belongs group 13. It has three element in the valence shell and hence its valence =3 Sulphur belongs to group 16. It has 6 valence electrons and hence its valence =8 -6 =2
Therefore the formula of the compound formed would be
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