The final product cannot be converted back to the original ingredients. This is why baking a chocolate chip cookie is a chemical reaction.
The modern periodic table can be divided into periods and groups.
Iron would be hotter, aluminum loses heat easier<span />
Potato cells contains starch. When you add iodine solution into potato cells, you may observe that the brown color of iodine on the potato changes into a blue black color. This is because a starch/iodine complex is formed and it has a blue black color.