Covalent Bonding Fundamentals and Diatomic Molecules

What is a covalent bond?

• A bond where electrons are shared between nonmetal atoms

• A bond between ions of opposite charges

• A bond between metal atoms

• A bond where electrons are transferred from one atom to another

Which of the following is NOT a diatomic molecule?

• Hydrogen

• Carbon

• Oxygen

• Chlorine

What is a coordinate covalent bond?

• A bond where both electrons in the shared pair come from the same atom

• A bond where electrons are equally shared between atoms

• A bond where electrons are transferred from one atom to another

• A bond between metal and nonmetal atoms

In the ammonium ion (NH4+), how many electrons does the nitrogen atom contribute to the lone pair shared with the hydrogen ion?

• Four electrons

• Three electrons

• Two electrons

• One electron

What is the charge on the hydronium ion (H3O+)?

• -1

• +2

• +1

• 0

Which of the following statements is true about polyatomic ions?

• They can form ionic bonds with ions of opposite charge

• They are held together by ionic bonds

• They consist of only one element

• They do not contain lone pairs of electrons

In the example of sodium sulfate, what type of bond exists between sodium and sulfate?

• Covalent bond

• Coordinate covalent bond

• Metallic bond

• Ionic bond

How many pairs of electrons are shared in a double covalent bond?

• One pair

• Two pairs

• Three pairs

• Four pairs

What is the total number of electrons shared in a triple covalent bond?

• Six electrons

• Eight electrons

• Two electrons

• Four electrons

Which of the following is an example of a molecule with a triple covalent bond?

• O2

• H2O

• CO2

• N2