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physical properties
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.
Boiling point is a physical property not a chemical property.
what property of matter has a characteristic that can be measured or observed without changing it idenity
Because you are not changing the composition of the substance, boils is a physical property.
Melting ice to get water, or boiling water to get steam, doesn't change the identity of H2O.
No, a physical property DOES NOT change the identity of a substance. That would be a chemical property which DOES change the identity.
physical properties
Physical Properties: The physical properties of a substance are those permanent properties which describe the physical characteristics of the material. Observation where possible, has no effect on the physical characteristic of the material.
I believe that you are referring to physical properties. They are observed without changing composition of the substance. Physical properties are more obvious things like colour, shape, etc.
Rusting is a chemical property because it is irreversible. It changes the identity of the substance.
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance.
Lustre is a physical property, because... Look up a few definitions of "chemical property." In every one you will find that it involves chemical reactions, or changes in the identity of a substance. Lustre (shininess) is a property that can be observed without any chemical changes to the substance, so it can't be a chemical property.
B: Physical Property
a physical change is a change in any physical property of a substance, not in the substance itself
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.
Density is a physical property; physical properties are measurable.