Which of the following describe chemical properties

Chemical properties are those properties that become evident when the material experiences some sort of change. Although there are numerous chemical properties, some most basic ones are reactivity with other chemicals, toxicity, flammability, heat of combustion, oxidation states, chemical stability, types of chemical bonds that will form and others. Unlike physical characteristics that don't change the chemical when altered, changing chemical properties will affect the chemical.

Answerhund's rule;