Differences between the properties of metals and non-metals
3 marks · EasyThe following table shows whether certain elements conduct electricity at room temperature:
| Element | Conducts electricity? |
|---|---|
| Magnesium | Yes |
| Bromine | No |
| Lead | Yes |
| Iodine | No |
Identify which two elements in the table are non-metals.
State what the data shows about the electrical conductivity of metals compared to non-metals.
Give one reason why electrical wires are not made from non-metals.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) Bromine and iodine
(b) Metals conduct electricity but non-metals do not.
(c) Non-metals do not conduct electricity.
Show mark scheme and worked solution
Marking points
A1 (a) · 1 mark · Identifies bromine and iodine as non-metals.
A2 (b) · 1 mark · States metals conduct, non-metals do not.
A3 (c) · 1 mark · States non-metals do not conduct electricity (or equivalent reason).
Worked solution
a Bromine and iodine are non-metals.
b The data shows that metals conduct electricity but non-metals do not.
c Electrical wires are not made from non-metals because non-metals do not conduct electricity.