1.

Using the Periodic Table, predict the formulae of compounds which might be formed by the following pairs of elements (a) Silicon and Bromine, (b) aluminum and sulphur.

Answer»

(a) Silicon is group 14 element with a valence of 4. Bromine belongs to the halogen family with a valence of 1. Hence the formula of the compound formed would be SiBr4

(b) Aluminium belongs to group 13 with a valence of 3. Sulphur belongs to group 16 elements with a valence of 2. Hence the formula of the compound formed would be Al2S3.



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