Covalent Bonding

What is a characteristic feature of a polar covalent bond?

• Electrons are shared equally between atoms.

• It forms between a metal and a nonmetal.

• It results in a dipole with partial positive and negative charges.

• The electronegativity difference between atoms is zero.

How does electronegativity generally change across the periodic table?

• Increases from left to right and decreases from top to bottom.

• Decreases from left to right and increases from top to bottom.

• Increases from left to right and increases from bottom to top.

• Decreases from left to right and decreases from bottom to top.

Which of the following bonds is considered nonpolar covalent?

• H-Cl

• O-H

• C-H

• Na-Cl

Which of the following is a typical property of substances with covalent bonds?

• High melting and boiling points.

• Good electrical conductors when dissolved in water.

• Exist primarily as crystalline solids.

• Low melting and boiling points.