Chemistry and more!

1234567891011
Across
  1. 2. chemical compound with the chemical formula CH4
  2. 6. a unit of measurement that denotes an amount of substance
  3. 7. an ancient branch of natural philosophy, a philosophical and protoscientific tradition
  4. 9. The rarest natural occurring element
  5. 10. pure chemical substance composed of more than one element
  6. 11. the scientific study of life and living organisms
Down
  1. 1. a discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents.
  2. 3. the smallest unit of matter
  3. 4. said to have first made the atom theory
  4. 5. process that leads to the chemical transformation of one set of chemical substances to another.
  5. 8. a substance with a specific composition