C2: Quiz 3
1) Do ionic compounds have high or low melting and boiling points? Explain your answer.
2) Do ionic compounds conduct electricity in a solid state? Explain your answer.
3) What does aqueous mean?
4) Do ionic compounds conduct electricity when they are liquid or aqueous? Explain your answer.
5) A crystal of sodium fluoride (NaF) is an ionic compound. Describe the structure of a sodium fluoride crystal.
Include the ions involved, the arrangement of the ions and what holds the ions together. Do not talk about how the electrons are transferred.
6) Sodium chloride has a melting point of 801°C. Magnesium oxide has a melting point of 2,852°C. Explain why the melting point of magnesium oxide is higher than the melting point of sodium chloride.
7) Sodium chloride is made out of sodium ions (Na+) and chloride ions (Cl-).
a) Add the sodium ions and chloride ions to the diagram below.
b) Give an advantage and disadvantage of using this type of diagram to show ionic bonding.
8) Magnesium sulphide is an ionic compound; the formula for magnesium sulphide is MgS.
a) What are the two different ions involved in magnesium sulphide?
b)
i) How many electron shells does a magnesium ion in magnesium sulphide have?
ii) How many electron shells does a sulphide ion in magnesium sulphide have?
c) Complete the diagram below; be careful with the colours of the ions.
d) Give an advantage and a disadvantage of using this type of diagram to show ionic bonding.