If the difference in electronegativities of two elements is very large, then

Define electronegativity of an element.

In which block of the periodic table the electronegativities of the elements are very similar ?

If the difference in electronegativity between two constituent element is .... the compound formed will have equal ionic and covalent character.

The more electronegative element is :

Define electronegativity of an element on Mulliken scale.