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Answer 1 · 2015-10-12T18:07:33

A bond formed between a metal and non-metal.

Ionic bonds are formed between metals and non-metals.

The metal transfers electrons to the non-metal.

This causes the formation of a cation (+ve charge) and an anion (-ve) charge, and hence there is an attraction between these ions.

E.g., the balanced equation for the reaction between #"Na"# and #"Cl"_2# is

#"2Na + Cl"_2 → "2Na"^+"Cl"^-#.

#"Na"# has 1 electron in its outer shell, and #"Cl"# has 7.

So #"Na"# needs to donate one electron to attain the stable octet of neon, and #"Cl"# needs to gain one electron to attain the stable octet of argon.

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The transfer of electrons forms an ionic compound, #"NaCl"#, more commonly known as common salt.