Elements of the Periodic Table

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Across
  1. 1. this element has an atomic mass of 19
  2. 3. a soft metal with the symbol Au
  3. 5. the positive subatomic particle of an atom
  4. 6. this metal is liquid at room temperature
  5. 10. a subatomic particle with no charge
  6. 12. atomic ______ describes the total particles in the center of an atom
  7. 14. a water molecule has only one of this element
  8. 15. orbits the nucleus of an atom
  9. 16. this element has 7 neutrons
  10. 17. the center of an atom
  11. 18. this element has 3 protons
  12. 19. atomic ______ describes the number of protons an atom has
Down
  1. 2. the name given to an atom which shares the atomic number but has a different atomic mass
  2. 4. the material Mr Morby's wedding band is made out of
  3. 7. this element has a mass of 59
  4. 8. the most abundant element in the universe
  5. 9. the 6th element on the periodic table
  6. 11. this element shares the name with a hit song by Sia
  7. 13. this element has the symbol V
  8. 15. this subatomic particle has a negative charge