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An Element 'A' Has Two Electrons in the Outermost Shell of Its Atom and Combines with an Element 'B' Having Seven Electrons in the Outermost Shell, Forming the Compound Ab2. the Compound When Dissolved in Water Conducts Electric Current. Giving Reasons, State the Nature of Chemical Bond in the Compound. - CBSE Class 10 - Science

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Question

An element 'A' has two electrons in the outermost shell of its atom and combines with an element 'B' having seven electrons in the outermost shell, forming the compound AB2. The compound when dissolved in water conducts electric current. Giving reasons, state the nature of chemical bond in the compound.

Solution

Compound AB2 is ionic in nature.
Explanation: Atom A has two electrons in its outermost shell and atom B needs one electron to complete its octet. Atom A transfers its two electrons to two atoms of B (one electron to each atom B) and gets stabilised by forming ionic bonds.
When dissolved in water, the ions of this ionic compound get separated from each other and conduct electricity across the solution.

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Solution An Element 'A' Has Two Electrons in the Outermost Shell of Its Atom and Combines with an Element 'B' Having Seven Electrons in the Outermost Shell, Forming the Compound Ab2. the Compound When Dissolved in Water Conducts Electric Current. Giving Reasons, State the Nature of Chemical Bond in the Compound. Concept: Formation and Properties of Ionic Compounds.
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