Atoms and elements

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Across
  1. 4. found along staircase have properties of metals and nonmentls
  2. 7. poor conductors of heat and electricity:on the left side of the periodic table
  3. 8. positivley charged particle in the nucleus of an atom
  4. 9. A tiny, negatively charged particle that moves around the nucleus of an atom.
Down
  1. 1. shiny, malleable, ductile and good conductors
  2. 2. the smallest unit of an element that maintains the properties of that element
  3. 3. horizontal rows on the periodic table
  4. 5. vertical columns on the periodic table that have common properties. Also known as families
  5. 6. A subatomic particle that is neutral and that is found in the nucleus of an atom
  6. 9. pure substance that consists entirely of one type of atom