Metals vs Non Metals Starter

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Across
  1. 4. A metalloid used in computer chips. (7)
  2. 6. The only metal that is liquid at room temperature. (7)
  3. 9. Negatively charged particle orbiting the nucleus of an atom. (8)
  4. 10. The mass per unit volume of a substance. (7)
  5. 12. The scientist who developed the first widely recognized periodic table. (9)
  6. 13. Positively charged particle in the nucleus of an atom. (6)
  7. 14. Horizontal rows in the periodic table. (6)
  8. 16. Elements in Group 17 with high reactivity. (8)
  9. 17. A precious metal with the chemical symbol Au. (4)
  10. 18. Vertical columns in the periodic table. (5)
Down
  1. 1. Very reactive metals found in Group 1 of the periodic table. (6)
  2. 2. The first element in the periodic table. (8)
  3. 3. Found in the central block of the periodic table, these metals are good conductors. (10)
  4. 5. A non-metal that forms the basis of organic compounds. (6)
  5. 6. Elements with properties of both metals and non-metals. (10)
  6. 7. Neutral particle found in the nucleus of an atom. (7)
  7. 8. Gases Unreactive elements found in Group 18. (11)
  8. 11. A gas used in balloons, found in Group 18. (6)
  9. 13. The arrangement of elements based on their atomic number. (8)
  10. 15. Essential for respiration and found in Group 16. (6)