Silver is a white metal that is an excellent conductor of heat and electricity. the density of silver is 10.49 g/cm3. silver does not react with water but does react with nitric acid. silver tarnishes when exposed to air. a physical property of silver is silver reacts with nitric acid. a.silver reacts with nitric acidb. silver does not react with waterc. the density of silver is 10.49 g/cm3.d. silver tarnishes when exposed to air.