Atoms & Molecules CW 1

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