Vocabulary Study Aid

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Across
  1. 2. one of two or more atoms of an element having the same number of protons, but a different number of neutrons
  2. 7. negatively charged particle that occupies the space in an atom outside the nucleus
  3. 10. single; separate
  4. 11. a mixture in which two or more substances are evenly mixed, but not bonded together
  5. 13. region at the center of an atom that contains most of the mass of the atom
  6. 14. region surrounding an atom’s nucleus where one or more electrons are most likely to be found
  7. 15. matter with a composition that is always the same
  8. 16. electrical property of some objects that determines whether the object is positive, negative, or neutral
  9. 18. positively charged particle in the nucleus of an atom
  10. 19. uncharged particle in the nucleus of an atom
  11. 20. atom that has a charge because it has gained or lost electrons
Down
  1. 1. made of two or more elements that are chemically joined in a specific combination
  2. 3. a mixture in which the substances are not evenly mixed
  3. 4. small particle that is the building block of matter
  4. 5. the number of protons in the nucleus of an atom of an element
  5. 6. matter that can vary in composition
  6. 8. two or more atoms that are held together by chemical bonds and act as a unit
  7. 9. a change in matter in which the substances that make up the matter change into other substances with different chemical and physical properties
  8. 12. substance made of only one kind of atom
  9. 17. anything that has mass and takes up space