Question

An element X from group 2 of the periodic table reacts with an element Y from group 17 to form a compound.
(a) What is the nature of the compound formed?
(b) State whether the compound formed will conduct electricity or not.
(c) Give the formula of the compound formed.
(d) What is the valency of element X?
(e) How many electrons are there in the outermost shell of an atom of element Y?

Answer 1

Answer:

a)it is a colorless crystalline compound. The salt is very hygroscopic. It has density of 2.325 g/cm3 (anhydrous), 1.56 g/cm3 (hexahydrate) and a high melting point of 987 K.

b) it doesnot conduct electricity in solid form but can conduct electricity in aqeous solution or molten form

c) MgCl2

d) +2

e) 7