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An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting.
(a) How many electrons would be there in the outermost shell of the element X?
(b) To which group of the periodic tables does the element X belong?
(c) Write the formula of the compound formed when X reacts with chlorine
(a) In the compound XO, both the elements are divalent, as the valency of oxygen is 2. Hence, the valency of X should be 2.
(b) As the element X belongs to Group 2. Therefore, its valency is also 2.
(c) The formula of the compound formed is XCl2, as chlorine has a valency of 1. Therefore, when one atom of X combines with two atoms of chlorine (Cl), the formula of the ionic compound formed will be XCl2.
Updated on: 10-Oct-2022
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