Answer :
Answer:
Mass
Explanation:
Boiling point, flamablity and thermal conductivity are properties of a compound. To be more specific, they are all physical properties of matter.
Mass is the odd one out. Mass is not property of compounds. It is simply more of the amount of matter which substance contains and it determines the weight of compounds.
Physical property tells us what a substance is when no change is occuring to its constituents. Chemical properties shows how compounds behaves when they undergo changes.