Chemical energy is stored in atomic bonds between atoms that form molecules.
Chemical energy can also be stored in the lack of bonds between atoms. For example carbon and oxygen exist separately because the Sun's energy was used by plants to separate them out from carbon dioxide in the atmoshpere. Re-creating those bonds to form carbon dioxide in the burning process releases the heat that was previously stored.
Chemcal
To get stability.
Either Exothermal or Endothermal.
Europium
potassium thiocyanate
color change and release of heat and light
It contains a CANCER chemcal!
Two or more chemcal elements combined in constant proportions.
Usually its the changing of the colour but in some cases it can be different.
No. That is a physical change.
For chemical energy, you could draw a representation of a molecule such as glucose or ATP, which store chemical energy in their bonds. Another option could be to sketch a diagram showing the energy released during a chemical reaction like the combustion of methane.
No, ertyhrosine is not cancerous. It is simply a chemcal that you use when your are preparing food. It is food colouring/dye.