Periodic Table

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Across
  1. 3. which element of the periodic table boiling point 3,927 °C
  2. 5. extracted from limestone
  3. 7. it glows reddish orange in a vacuum tube.
  4. 9. which element of the periodic table is the second most common element in the Universe (after hydrogen), making up around 24% of its mass.
  5. 10. sometimes referred to as the "Devil's Element," because it used to be the thirteenth element discovered and because of its explosive properties.
  6. 14. Atomic number is 9
  7. 15. makes up around 78% of the air you breathe
  8. 18. It is the sixth most abundant metal in the Earth's crust
  9. 19. a French scientist Antoine Lavoisier named -------- and he carried out a variety of experiments to reveal its nature.
Down
  1. 1. Melting point -189.4 °C
  2. 2. which element of the periodic table It is so light it can float on water
  3. 4. helps your bones grow stronger
  4. 6. what element of the periodic table symbol is be
  5. 8. lighter halogen than chlorine.
  6. 11. which element of the periodic table makes up more than 90 percent of all the atoms.
  7. 12. -most abundant mineral on Earth after oxygen and silicon
  8. 13. most abundant element in the universe by weight
  9. 16. is a member of the chalcogen group on the periodic table
  10. 17. 15 on the periodic table