Usingthe PeriodicTable , predict theformulas of thecompoundswhichmightbe formedby thefollowingpairsof elements: (a)silliconand bromine (b)aluminiumand sulphur.

Usingthe PeriodicTable , predict theformulas of thecompoundswhichmight

1.	Usingthe PeriodicTable , predict theformulas of thecompoundswhichmightbe formedby thefollowingpairsof elements: (a)silliconand bromine (b)aluminiumand sulphur.
Answer» Solution :(a) SILICON belongto group14.It has fourvalenceelectronsand henceits valence=4 . Brominebelongsto GROUP 17. It has sevenvalence electronsand henceits valence =8-7 =1 thereforethe FORMULAOF thecompoundformedwould be (b) Aluminiumbelongs group 13. Ithas three element in thevalenceshelland henceits valence =3Sulphur belongsto group 16. Ithas 6 valence electronsand henceitsvalence =8 -6 =2 Thereforethe formulaof the compoundformedwould be