Question

An atom X has 2,8,7 electrons in its shells. It combines with Y having 1 electron in its outermost shell. What type of bond will be formed between X and Y?

• A. Covalent bond
• B. Coordinate bond
• C. Ionic bond
• D. Metallic bond

Answer 1

The correct option is C

Ionic bond

Atom Y has 1 electron in its valence shell and atom X have 7 electrons in the valence shell. Atom Y acquires a stable configuration by losing 1 electron from its outermost shell and thus become a positive Y ion($Y^{+}$). However, X atom which contains 7 electrons in its outermost shell can accept 1 electron donated by Y ion to acquire a stable configuration. So, compound XY is formed as a result of the transfer of electrons from atom Y to atom X to form an ionic bond and the compound XY is called an ionic compound.