Hardness
Chemical property.
A physical state is physical and not chemical Physical Property is observed without changing a substance into another substance. Chemical property is the ability of a substance to change into different substance.
Radiation would be a chemical property. Remember, a physical property is something that does not change the composition or "identity" of a substance whereas a chemical property is something that does. Since anything exposed to radiation for a good amount of time would experience change in composition, it is thus referred to as a chemical property.
The ability to combine with another substance is a chemical change. This is because once the substance is made it can not be taken out.
Chemical and physical properties
hardness
It is a change of a physical property - for example the variation of temperature.
Chemical property.
The Mohs Scale of Hardness measures how well a substance resists scratching by another material.
solids
physical
A physical state is physical and not chemical Physical Property is observed without changing a substance into another substance. Chemical property is the ability of a substance to change into different substance.
Magnetism is a physical property that is mediated by magnetic fields.The magnetic state of a material depends on temperature (and other variables, such as pressure and the applied magnetic field), so a material may exhibit more than one form of magnetism depending on its temperature, etc. However, a material's magnetism doesn't change the composition, and doesn't involve a chemical reaction.
Its a chemical property because the substance has changed into another
physical
A physical state is physical and not chemical Physical Property is observed without changing a substance into another substance. Chemical property is the ability of a substance to change into different substance.
Colourless is a property, or word to describe matter, however the "gas" would be something you're describing. However, if a reaction is omitting a colourless gas, it could be considered a physical property of the reaction.