PERIODIC TABLE

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Across
  1. 2. AN INERT GAS THAT IS USED IN WELDING METALS.
  2. 3. A GAS USED IN PARTY BALLOONS SO THAT THEY FLOAT IN AIR.
  3. 5. AN INERT GAS THAT IS USED IN ADVERTISING SIGNS.
  4. 6. A METAL ELEMENT THAT IS FOUND AS A COMPOUND IN OUR BONES.
  5. 10. HORIZONTAL ROWS OF ELEMENTS FOUND IN THE PERIODIC TABLE.
  6. 12. A METAL ELEMENT WHICH IS THE ONLY LIQUID METAL AT ROOM TEMPERATURE.
  7. 13. A VERY ACTIVE METAL THAT REACTS VIGOUROUSLY WITH WATER AND IS AN ELEMENT FOUND IN OUR TABLE SALT.
Down
  1. 1. A GAS WHICH IS USED TO STERILISE DRINKING WATER AND WATER IN SWIMMING POOLS.
  2. 4. A RUSSIAN SCIENTIST WHO WAS RESPOSIBLE FOR ARRANGING ELEMENTS IN THE PERIODIC TABLE.
  3. 6. A NON METAL WHICH CONDUCTS ELECTRICITY.
  4. 7. A WORD USED TO DESCRIBE AN ELEMENT THAT DOES NOT CHEMICALLY COMBINE WITH OTHER ELEMENTS.
  5. 8. A METAL WITH THE SYMBOL Mg.
  6. 9. ARE SHINY WHEN SCRATCHED, CONDUCT ELECTRICITY ARE MALLEABLE.
  7. 11. VERTICAL COLUMNS OF ELEMENTS IN THE PERIODIC TABLE.