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- 1. Multiple Choice
Which two substances are ionic compounds?
sodium chloride (NaCl)
carbon dioxide (CO₂)
water (H₂O)
magnesium oxide (MgO)
- 2. Multiple Choice
Which three of the following are features of ionic compounds? (click 3 boxes)
They have bonds between metals and non-metals.
They have bonds between two non-metals.
They form simple molecular structures.
They form giant ionic lattices.
They involve the transfer of electrons.
- 3. Multiple Choice
Ionic compounds form giant ionic lattices. What forces hold the giant ionic lattices together?
strong frictional forces between the surfaces of the atoms
strong magnetic forces of attraction between the poles of ions
strong electrostatic forces of attraction between oppositely charged ions
- 4. Multiple Choice
Why do ionic compounds have high melting and boiling points?
Their ions are free to move.
Their ions are held in fixed positions.
They have many strong bonds.
They have many weak bonds.
- 5. Multiple Choice
True or false? Ionic compounds have high melting points.
true
false
- 6. Multiple Choice
True or false? Ionic compounds have low boiling points.
true
false
- 7. Multiple Choice
At room temperature, are ionic compounds solids, liquids or gases? Justify your answer.( click 2 boxes)
solids
liquids
gases
Room temperature is lower than the melting points of ionic compounds.
Room temperature is higher than the boiling points of ionic compounds.
- 8. Multiple Choice
True or false? Ionic compounds conduct electricity when they are in their solid state.
true
false
- 9. Multiple Choice
Why do ionic compounds NOT conduct electricity when they are in their solid state?
Their ions are free to move.
Their ions are held in fixed positions.
- 10. Multiple Choice
Why do ionic compounds conduct electricity when they are molten or dissolved?
Their ions are free to move.
Their ions are held in fixed positions.
- 11. Multiple Choice
Which two compounds are ionic?
compound A
compound B
compound C
compound D
compound E
- 12. Multiple Choice
Magnesium oxide is insoluble in water. Can magnesium oxide conduct electricity?
Select yes or no and a reason.
Yes
No
Magnesium oxide can be heated so that it melts and conducts electricity.
Magnesium oxide doesn't dissolve, so it stays in its solid state and doesn't conduct electricity.
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