Identify whether the given is a physical property or chemical property
a. the density of silver is 10.49 g/mL
b. the hardness of silver is 2.5 Mohs scale
c. the reactivity of silver with acid
d. the melting point of silver is 961.8 °C

• A. physical, physical, chemical, chemical
• B. physical, chemical, chemical, chemical
• C. physical, physical, chemical, physical
• D. physical, physical, physical, physical

Answer: (C)