Which observation indicates a chemical property? slowly dissolves

turns cloudy

turns black

gritty

What are similarities and differences between refraction, reflection, diffraction and absorption?

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

Ascientific blank must be testable and capable of being proven false?