Question

Compounds formed when an element of group 2 combined with an element of group 16

Answer 1

The valency of the group of elements is 1 and that of oxygen is 2

⇒ H    O

     1     2       [Cris cross]

⇒ H₂O is the formula for their oxides.

(iii) The valency of the Group 2 elements is +2 and that off Group 16 elements is -2

⇒ Mg    O

     2        2  [Cris cross]

⇒ MgO is the formula. 

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