What are the differences between inorganic and organic compounds

Organic compounds always contain carbon while inorganic compounds contain metal and other elements. Carbon-Hydrogen bonds are the characteristic of organic compounds while these are not found in inorganic compounds. Inorganic compounds contain metal atoms while they are never found in organic compounds.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).