Chemistry

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Across
  1. 4. Simplest type of pure substance.
  2. 5. The number of protons in the nucleus of an atom.
  3. 6. An organized table that shows all discovered chemical elements.
  4. 9. Subatomic particle with no electric charge found in the nucleus of an atom.
  5. 10. An atom or molecule with a positive or negative charge.
Down
  1. 1. Structure made up of two or more atoms.
  2. 2. Subatomic particle that has a positive charge and is found in the nucleus of an atom.
  3. 3. Substance made up of molecules that contain more than one kind of atom.
  4. 7. Negatively charged subatomic particle found in an area outside of the nucleus.
  5. 8. Smallest particle of an element that has all the properties of that element.