Answer;
0.5 and 1.6
0.5
A chemical bond is considered polar when the value of the electronegativity difference falls between 0.5 and 1.6 ; nonpolar when the value is less than 0.5.
Explanation;
- Nonpolar Covalent is a type of bond occurs when there is equal sharing of the electrons in the bond. For example in molecules such as Cl2, H2 and F2.
- Polar Covalent is a type of bond occurs when there is unequal sharing between the two atoms, of the electrons in the bond. For examples in molecules such as; NH3 and H2O.
- If the electronegativity difference between the atoms involeved in bond formation is less than 0.5, then the bond is nonpolar covalent.
- While, If the electronegativity difference is between 0.5 and 1.6, then the bond is considered polar covalent
- But when the electronegativity difference is greater than 2.0, then the bond is ionic