Ionic bonds result from high electronegativity differences.
a. true
b. false

True

Explanation: An ionic bond is formed when an element completely transfers its valence electron to another element.

Electronegativity is defined as the property of an element to attract a shared pair of electron towards itself.

The element which donates the electron is known as electropositive element and the element which accepts the electrons is known as electronegative element.

This bond is formed between a electropositive metal and a electronegative non-metal .