chemical change
Melting point. That depends entirely on the substance. Different things liquefy at different temperatures.
Sodium chloride is it an entirely different substance with its own unique properties.
Chemical Change.
When sulfur burns it reacts with oxygen to form sulfur dioxide, which is an entirely different substance from sulfur or oxygen.
Chemical Change
Chemical change.
Chemical change.
Chemical Change.
Chemical Change.
Chemical change.
The answer to this question is entirely dependent on the type of substance. This temperature is called the boiling point.
Chemical change.