Q. 644.0( 4 Votes )
An element X is in group 2 of the periodic table:
(a) What will be the formula of its chloride?
(b) What will be the formula of its oxide?
(a) The formula of its chloride is XCl2 because it has two electrons in its valence shell.
(b) The formula of its oxide is XO.
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Account for the following:
a. Cations are smaller in size than the corresponding atom.
b. The noble gases were discovered very late.Xam idea - Science
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