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Across
  1. 1. cloud a visual model representing the region around an atom's nucleus where electrons are most likely to be found, rather than orbiting in fixed paths
  2. 3. Anything that has mass and occupies space
  3. 5. Subatomic particles with negative energy
  4. 7. property Propety of an element that you use your senses to observe
  5. 9. a uncharged atomic element
  6. 10. A fundamental substance in chemistry
Down
  1. 2. symbol the abbreviations used in chemistry, mainly for chemical elements
  2. 4. table is an ordered arrangement of the chemical elements into rows and columns
  3. 6. Charged particle that have uneven number of protons and electrons
  4. 7. Subtonic particles that have a positive charge located in the nucleus of a atom
  5. 8. Smallest unit of a chemical element
  6. 11. number the total count of protons and neutrons in an atom's nucleus