Gina carried out tests on two giant covalent substances. Her results are shown in the table. What will she enter in space (i)?
\multirow{2}{*}{Property}\multicolumn{2}{|c|}{Substance}
A B
AppearanceBlack Shiny
Conducts electricity?(i) No
When rubbed on paper...Leaves a black mark Nothing
Can it be cut with a sharp knife?Yes (ii)
\multirow{2}{*}{Property} | \multicolumn{2}{|c|}{Substance} | |
| A | B | |
Appearance | Black | Shiny |
Conducts electricity? | (i) | No |
When rubbed on paper... | Leaves a black mark | Nothing |
Can it be cut with a sharp knife? | Yes | (ii) |