1. Sodium Chlordie does not conduct electricity when it is solid. Explain, in terms of ions, why sodium chlordie solution conducts electricity?
Answer: The ions carry the charge needed to conduct because of free electrons.
2. Why are chloride ions attracted to positive electrodes?
Answer: Opposite charges attract.
3.What could cause an anomalous result in an experiment?
Answer: Gas escapes, measurement error, timing error etc.
4. How could you check the reliability of a set of results?
Answer: Repeat the experiment, compare results with another set for the same experiment with the same method.
5. Explain why metals can be shaped.
Answer: Made of layers/atoms/ions/particles/rows which can slide/slip…