mist is a mean of u.s of energy & silver is a mean of mist ->  gold is in solid state  pluto is steam at outside australia & steam is a mean of u.s of energy ->  mercury is in liquid state  gold is in solid state & mercury is in liquid state ->  gold and mercury are in different states of matter  gold and mercury are in different states of matter & u.s of energy is a mean of physical public -> gold and mercury are different in a physical property