Which pair of atoms will form an ionic compound? a) one atom of oxygen and two atoms of fluorine eliminate b) one atom of calcium and two atoms of chlorine c) one atom of nitrogen and three atoms of fluorine d) two atoms of nitrogen and four atoms of oxygen

Answer : The correct option is, (B) One atom of calcium and two atoms of chlorine.

Explanation :

Ionic compound : It is a compound in which the atoms are bonded through the ionic bond.  The ionic bonds are formed between the one metal and one non-metal. It is formed by the complete transfer of electrons.

Covalent compound : It is a compound in which the atoms are covalently bonded. The covalent bonds are formed between two non-metals.  The covalent bonds are formed by the equal sharing of the electrons.

From the given options, only option (B) pair of atoms will form an ionic compound because calcium is a metal and chlorine is a non-metal. While the other options will not form an ionic compound because the two atoms are non-metals.

Hence, the correct option is, (B) One atom of calcium and two atoms of chlorine.

pure substance: iron,copper

impure substance: water,charcoal

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