Term 4 Science Terms

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Across
  1. 3. when two or more atoms combine chemically
  2. 5. unit of matter,they consist of nucles
  3. 8. particle without an electrical charge
  4. 9. a substance formed by two other substances
  5. 10. alike with the nucleus of the hydrogen atom
  6. 11. has a high understanding of sciences
  7. 14. substances with radiation
  8. 16. 21 percent Earths atmosphere
  9. 18. negativly charged particles of an atom
  10. 19. kind of matter with uniform properties
  11. 20. silvery-white, hard metallic element
Down
  1. 1. has of only one type of atom or molecule
  2. 2. has no fixed shape or volume
  3. 4. group of two or more atoms
  4. 6. Amount of matter in an object
  5. 7. known chemical elements in an array
  6. 12. two or more substances combined physically
  7. 13. chemical element, with the symbol H
  8. 15. element with the same atomic number
  9. 17. colorless, odorless, chemically inactive