Chemistry Crossword Puzzle

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Across
  1. 4. Characteristics that can be seen without changing the identity.
  2. 5. Groups of atoms that stay together and have an overall charge. and one name.
  3. 6. Atoms or groups of atoms that either have a positive or negative charge.
  4. 7. A combination of symbols that represent a compound.
  5. 8. A negative charge that causes the atom to gain valence electrons.
  6. 9. A substance that is made up of only one type of atom.
  7. 10. A number that indicates the number of atoms of an element.
  8. 14. Components that are unevenly distributed.
  9. 16. Does not depend on the amount of matter present.
  10. 17. Matter that has only one of chemical and physical properties.
  11. 18. Two or more elements chemically combining together.
  12. 19. Depends on the amount of matter present.
  13. 20. A positive charge that causes the atom to lose valence electrons.
Down
  1. 1. Two or more pure substances that are combined together.
  2. 2. A measure of tendency of an atom to attract electrons towards itself.
  3. 3. Components that are evenly mixed.
  4. 11. Metals that use roman numerals to indicate their charge.
  5. 12. The energy required to remove electrons from a neutral atom of an element.
  6. 13. Describes how a substance changes into new substances by either combining or breaking apart from other elements.
  7. 15. Electrons on the outermost shell of an element.