Chemistry - Matter

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Across
  1. 3. Substance made up of only one type of atom.
  2. 6. Atoms of the same element with different numbers of neutrons.
  3. 7. Emission of energy as electromagnetic waves or subatomic particles.
  4. 8. Representation or simulation of something.
  5. 9. The fundamental unit of matter.
  6. 10. Negatively charged particle orbiting an atom's nucleus.
Down
  1. 1. Central core of an atom.
  2. 2. Neutral particle in an atom's nucleus.
  3. 4. Pertaining to the periodic table of elements.
  4. 5. Positively charged particle in an atom's nucleus.