Question

an element X from group 2 of the periodic table reacts with Y from group 17 to from a compound give the formula of the compound updated​

Answer 1

Answer:

Compound formula

$XY_{2}$

Explanation:

Electrovalency of X is 2 and Y is 1

Answer 2

Answer:

Valency of X is +2

Valency of Y is -1

so the compound is XY2