The table below shows the properties of four substances, W, X, Y and Z.
Substance | Melting point | Boiling point | Conducts electricity when |
/ o C | / o C | solid | liquid | |
W | 3410 | 5930 | yes | yes |
X | 801 | 1413 | no | yes |
Y | 3550 | 4830 | no | no |
Z | -91 | 98 | no | no |
Use the information in the table to identify the substance that is an ionic compound.
☐ | A | substance W | |
☐ | B | substance X | |
☐ | C | substance Y | |
☐ | D | substance Z |
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