Aphysical property of gold is its a. density. c. non-flammability. b. reactivity with powerful acids. d. none of the above

A. density.

Physical properties can be measured without changing the material. Chemical properties are observed in changing the material. Reactivity and flammability require a change/reaction of the chemical so they are chemical properties, not physical.

1. A 2. C 3. A 4. B. all you got to do is pay attention to what's going on, understand from there point of view. try putting your feet in there shoes and seeing how you would feel if you lived that life.