Usually its the changing of the colour but in some cases it can be different.
No, evaporation is a physical change and not a sign of a chemical change. Evaporation involves the change of a substance from a liquid to a gas without altering its chemical composition.
No. That is a physical change.
color change and release of heat and light
Yes, the balanced chemical equation is as follows: 6CO2 + 6H2O yeilds (or changes to) C6H12O2 + 6O2.
Chemcal
To get stability.
Either Exothermal or Endothermal.
potassium thiocyanate
Europium
It contains a CANCER chemcal!
Two or more chemcal elements combined in constant proportions.
If you mean the ADDITIVE INVERSE, change the minus sign to a plus sign. (And if you see a plus sign, you change it to a minus sign.)