Unit 6: Chemical Bonding Post Test

Select the correct answer. The placement of the double bond goes between which two atoms in this formaldehyde molecule? Note: Hydrogen, carbon, and oxygen have one, four, and six valence electrons respectively.

• between the carbon and a hydrogen atom

• between the carbon and the oxygen atom

• between the two hydrogen atoms

• between the oxygen and a hydrogen atom

• between the oxygen and both hydrogen atoms

Select the correct answer. Why are metals good conductors of heat and electricity?

• anions rotate around the stationary electrons

• cations rotate around the stationary electrons

• free moving atoms in metals carry both heat and electric current

• free moving electrons in metals carry both heat and electric current

• free moving protons in metals carry both heat and electric current

Select the correct answer. Which of the following is made up of a coordinate covalent bond?

• sodium chloride (NaCl)

• ammonia (NH₃)

• chlorine (Cl₂)

• aluminium bromide (AlBr₃)

• carbon monoxide (CO)

Select the correct answer. Which of the following is the correct Lewis structure for ammonia (NH₃)? Note: Hydrogen and nitrogen have one and five valence electrons respectively.

• figure A

• figure B

• figure C

• figure D

• figure E

Select the correct answer. What is the chemical name of the compound Cu₂CO₃?

• Copper (I) Carbonate

• Copper (II) Carbonate

• Copper (III) Carbonate (II)

• Copper (III) Carbonate

• Copper Carbonate

Select the correct answer. What is the formula for the compound iron (III) sulfate?

• FeSO₄

• Fe₂(SO₄)₂

• Fe₂(SO₄)₃

• Fe₂(SO₄)₄

• Fe₃(SO₄)₅

Select the correct answer. What is the formula for the compound dinitrogen pentoxide?

• N₄O₅

• N₂O₄

• N₄O₆

• N₂O₂

• N₂O₅

Select the correct answer. Which is a binary ionic compound?

• MgCl₂

• C₆H₁₂O₆

• CO₂

• PO₄³⁻

• CH₄

Select the correct answer. How many valence electrons does the Lewis structure for a chlorine atom show?

• four

• five

• six

• seven

• eight

Select the correct answer. Which is an acceptable Lewis structure for a diatomic nitrogen molecule?

• :N≡N:

• .N≡N:

• :N≡N:

• .N=N:

• :N=N: