Covalent Bonds Practice 2

How do the Lewis structures for ozone (O₃) differ from one another?

• arrangement of atoms

• number of valence electrons

• electron arrangement

• electrical charge

What best describes the O-O bonds in ozone (O₃)?

• One is a single bond and one is a double bond.

• They are identical double bonds.

• They are identical single bonds.

• They are identical bonds that are between a single and double bond.

How many valid Lewis structures can be drawn for the carbonate ion, CO₃^2-?

• 1

• 2

• 3

• 4

• more than 4

What statement best describes a covalent bond?

• A chemical bond that involves the sharing of a pair of electrons between atoms in a molecule.

• A chemical bond in which one atom loses an electron to form a cation and another atom gains an electron to form an anion.

• A chemical bond in which four or more electrons are shared.

• A chemical bond in which no atoms are shared.

What is the electronegativity difference between the N-Cl bond? Is the bond polar or non polar?

• 0, polar

• 0 non polar

• 3.0 ionic

• 3.0 non polar

Which of the following is NOT formed by a covalent bond?

• K₂S
• H₂O
• I₂
• CO₂

What do we call a covalent bond where electrons are shared UNEVENLY or UNEQUALLY?

• Ionic
• Polar Covalent
• Nonpolar Covalent
• Van der Waals Force

In an electron dot diagram, two pairs of shared electrons represents a ...

• single bond
• double bond
• triple bond
• quadruple bond

A Nitrogen molecule (N2) has one triple bond. How many electrons do the nitrogen atoms share?

• 1
  1
• 3
• 4
• 6

Compared to ionic compounds, molecular compounds generally have...

• good conductivity
• greater densities
• more chemical bonds
• a low boiling point