Chemystery

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Across
  1. 2. ___ gas, an inert gas such as helium, argon, and radon
  2. 4. A positively charged subatomic particle
  3. 6. Chemical element with symbol Xe and atomic number 54
  4. 7. Solid, gas, plasma, and ___
  5. 13. Study of chemical processes related to living things
  6. 15. Starting material(s) in a chemical reaction
  7. 18. elements that have properties of both metals and nonmetals
Down
  1. 1. An atom of the same element, having the same atomic number but different mass number
  2. 3. SI unit of energy
  3. 5. Movement of solvent molecules across a semipermeable membrane
  4. 8. Building blocks of protons and neutrons with an electric charge
  5. 9. The fixed path on which an electron moves or revolves around the atom's nucleus
  6. 10. Process of which plants synthesize foods, with a chemical equation of 6CO2+6H2O→C6H12O6+6O2
  7. 11. SI unit of temperature
  8. 12. Chemical element that makes up 78% of air
  9. 14. ___ electrons, which are the electrons on the outside of the atom.
  10. 16. ___ metals, Group 1 (Ia) on the periodic table
  11. 17. Substance made up of multiple chemically bonded elements