An element X from group 2 of the periodic table reacts with an element Y from group 17 to from 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?
(a) The nature of the compound is Ionic.
(b) The compound formed will conduct electricity.
(c) The formula should be XY2.
(d) The valency of the element X is 2 because it belongs to the second group of the periodic table.
(e) The Y element belongs to 17th group so there are 7 electrons in the outermost shell.