acidic or basic? density explosion happen (combustion) mass temperature it boils only observed when matter...

acidic or basic?
density
explosion happen (combustion)
mass
temperature it boils
only observed when matter changes form
can be dissolved
temperature it melts
is it stretchy
flammability
can it rust?
how it looks
it is magnetic
can be observed without changing it
new material created
toxicity
react with oxygen
is it brittle
heat conduction