What are 8 physical properties a substance can possess?

Answer 1

1) Mass

2) Volume

3) Density

4) Boiling Point

5) Melting Point

6) Solubility

7) Color

8) Odor

...but you need not stop there -- there are plenty of additional characteristics a substance possesses, some fundamental, some esoterical. The question implies the former rather than the latter so:

9) Length )

10) Width } The Four Fundamental

11) Depth } Dimensions

12) Duration )

13) Temperature

14) Refractive Index

15) State (Solid, Liquid, Gas, Plasma)

16) Radioactivity

17) Purity (Element, Compound, Mixture)

18) Reactivity

17) Half-Life

18) Charge (matter or antimatter)

19) Organic or Inorganic

...and the list goes on and on...