Which one of the following properties is NOT a chemical property? (5 points) a
Density

b
Flammability

c
Heat of combustion

d
Reactivity

heat or electricity in the atmosphere- c.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

12 is it do you think so