Question

A newly discovered element $X$ is placed in group $IA$ of the periodic table since it forms :

• A. an oxide which is acidic
• B. a volatile chloride having a formula $XCl$
• C. an ionic chloride having the formula $XCl$
• D. an insoluble $X{SO}_4$

Answer 1

Answer: (C)

an ionic chloride having the formula $XCl$

The elements in group I of the periodic table are called the alkali metals. They form ionic compounds when they react with non-metals. Their ions have a single positive charge. For example, sodium forms sodium ions, $N{a}^{+}$.

The elements in Group 7 of the Periodic Table are called the halogens. They form ionic compounds when they react with metals. Their ions have a single negative charge. For example, chlorine forms chloride ions, $C{l}^{-}$.

Group $1A$ elements form $XCl$ type chloride.