Physical Science Crossword

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Across
  1. 2. Group 18 elements, very stable and unreactive.
  2. 4. The scientist who arranged the periodic table by atomic number.
  3. 6. in Group 1 that are highly reactive with water.
  4. 8. central part of an atom that contains protons and neutrons.
  5. 9. Elements in Group 17, known as “salt formers.”
  6. 10. Elements on the left side of the table that are shiny and good conductors of heat and electricity.
Down
  1. 1. charged particles found outside the nucleus.
  2. 2. The number of protons in the nucleus of an atom.
  3. 3. most abundant element in the universe, atomic number 1.
  4. 5. Vertical columns on the periodic table.
  5. 7. The horizontal rows of the periodic table.
  6. 8. Smallest particle of an element that retains its identity.
  7. 9. that have properties of both metals and nonmetals.