8th Grade Science - Shin

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Across
  1. 2. Two or more substances that are physically blended together but not chemically bonded.
  2. 4. The central part of an atom that contains most of its mass.
  3. 7. A nuclear reaction where a heavy nucleus splits into smaller parts.
  4. 8. A subatomic particle with a positive charge; it determines the element's identity.
  5. 10. A nuclear reaction where light nuclei combine to form a heavier nucleus (occurs in stars).
  6. 11. The term for the electrons found in the outermost shell of an atom.
  7. 12. A subatomic particle with a neutral charge found in the nucleus.
  8. 13. The element that is the basis of all organic life; it has 6 protons.
Down
  1. 1. The specific arrangement or "map" of where electrons are located in an atom’s shells.
  2. 3. A subatomic particle with a negative charge that exists in clouds outside the nucleus.
  3. 5. A substance made of two or more different elements that are chemically bonded.
  4. 6. The phase change where a substance goes directly from a gas to a solid.
  5. 9. The phase change where a solid turns directly into a gas without becoming a liquid first.