Which describes an isotope of lodine? a. It can be divided into smaller particles that reta in all the properties of iodine.
b. It can have the same protons but different mass and neutrons.
c. It does not possess all the properties of a larger quantity of iodine.
d. It has an atomic number of 127

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".