CH.11 L.1&2 (no spaces)

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Across
  1. 4. matter that can vary in composition
  2. 5. uncharged particle in the nucleus of an atom
  3. 8. substance made of only one kind of atom = 118 elements on periodic table
  4. 10. cloud: region surrounding an atom’s nucleus where one or more electrons are most likely to be found
  5. 11. the number of protons in the nucleus of an atom of an element
  6. 13. single; separate
  7. 17. a mixture in which two or more substances are evenly mixed, but not bonded together
  8. 18. electrical property of some objects that determines whether the object is positive, negative, or neutral
  9. 19. atom that has a charge because it has gained or lost electrons
  10. 20. region at the centre of an atom that contains most of the mass of the atom
Down
  1. 1. negatively charged particle that occupies the space in an atom outside the nucleus
  2. 2. a mixture in which the substances are not evenly mixed
  3. 3. positively charged particle in the nucleus of an atom
  4. 6. one of two or more atoms of an element having the same number of protons, but a different number of neutrons
  5. 7. two or more atoms that are held together by chemical bonds and act as a unit
  6. 9. small particle that is the building block of matter
  7. 12. matter with a composition that is always the same
  8. 14. change: a change in matter in which the substances that make up the matter change into other substances with different chemical and physical
  9. 15. anything that has mass and takes up space
  10. 16. substance made of two or more elements that are chemically joined in a specific combination