Atoms & Molecules CW 2

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Across
  1. 1. the number of protons in an atom of an element
  2. 4. Two or more atoms bonded together.
  3. 7. The basic unit of an element. All matter is made up of atoms.
  4. 10. change of state from a gas to a liquid
  5. 11. A chart of all known elements that scientists reference when working with atoms or molecules.
  6. 12. any of two or more atoms of the same element that have different numbers of neutrons
  7. 17. change of state of a liquid into a gas
  8. 18. decay process that occurs when an unstable atomic nucleus changes into another more
  9. 21. matter that has a definite volume and a definite shape
  10. 23. Protons and neutrons clump together at the center of an atom to form the nucleus of an atom.
Down
  1. 2. describes elements that spontaneously emit radiation stable nucleus by emitting radiation
  2. 3. Anything that has mass and takes up space.
  3. 5. occurring without external force or cause
  4. 6. vaporization that occurs only at the surface of a liquid
  5. 8. A positively charged subatomic particle located at the center of an atom.
  6. 9. sum of the number of protons and neutrons in an atom
  7. 13. A subatomic particle of an atom that is negatively charged and orbits the nucleus extremely fast.
  8. 14. matter that has no definite volume and no definite shape
  9. 15. atom that is no longer neutral because it has gained or lost electrons
  10. 16. gas state of a substance that is normally a solid or a liquid at room temperature
  11. 19. matter with a definite volume but no definite shape
  12. 20. Area around an atomic nucleus where an electron is most likely to be found.
  13. 22. A subatomic particle with no charge located at the center of an atom.