bonds are formed when the electronegativity difference is 0.4 > 2.0. Give two examples:

Ionic Bond is formed when the electronegativity difference is 0.4 > 2.0. Electronegativity is a term that can be defined as a tendency of an atom to attract electron towards its own self.

Explanation:

Electronegativity is a term that can be defined as a tendency of an atom to attract electron towards its own self.

An  electronegativity of an atom is affected by

1. In case the  electronegativity difference (which is denoted by  ΔEN) is less than 0.5  then the bond formed is known as Nonpolar covalent.

2. In case  the ΔEN is in between 0.5 and 1.6, the bond formed is referred to as the Polar covalent

3. In case  the ΔEN is more /greater  than 2.0, then the bond formed is referred to as Ionic Bond

2 Examples of Ionic bonds

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3