Which is an intensive property of a substance?

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

Answer explain why it is not possible to deduce a complete order of reactivity.

Which element is least likely to undergo a chemical reaction