What Are Elements?

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Across
  1. 4. Device originally called a voltaic pile.
  2. 6. His experiments helped establish the law of conservation of mass.
  3. 8. Pure substance made of two or more elements.
  4. 10. Negatively charged particle.
  5. 11. Explains why something happens in chemistry.
  6. 12. The center of the atom is called the …
  7. 14. Positively charged particle.
Down
  1. 1. Tried to change base metals into gold.
  2. 2. His atomic theory states that all matter is made of small particles.
  3. 3. Electrons are most likely found in the electron _____.
  4. 5. Decomposing a chemical compound by passing an electric current through it.
  5. 7. Pure substance made of one type of atom.
  6. 9. Uncharged particle.
  7. 13. Describes and summarizes what happens in chemistry.