Chemistry

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Across
  1. 1. The quantity of matter contained in an atom of an element
  2. 3. A solid material that is typically hard, shiny
  3. 7. The number of protons in the nucleus of an atom
  4. 9. A small particle with a negative charge.
  5. 10. The number of. atoms of that element.
Down
  1. 2. A substance made from two or more different elements that have been chemically joined.
  2. 4. A small, positively charged particle of matte
  3. 5. Anything that takes up space.
  4. 6. The particles in an atom that have a neutral charge.
  5. 8. The branch of science that deals with the properties, composition, and structure of elements and compounds.