The properties of a substance that remain the same regardless of the size of the sample are known as intensive properties. These include:
- Melting point
- Boiling point
- Conductivity
- Density
- Solubility
Mass, on the other hand, is an extensive property, meaning it does change with the size of the sample.
So, the correct response would be:
melting point, boiling point, conductivity, solubility, and density only.