Science Crossword

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Across
  1. 4. or false? Bases have a pH level below 7.
  2. 5. is H20 more commonly known as?
  3. 7. or false? A neutron has no net electric charge.
  4. 8. is the chemical symbol for which element?
  5. 9. nucleus:What is the centre of an atom called?
  6. 11. New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field?
  7. 14. or false? A proton carries a positive charge.
  8. 15. room temperature, what is the only metal that is in liquid form?
  9. 16. is the fourth most abundant element in the universe in terms of mass?
  10. 19. is the chemical symbol for gold?
Down
  1. 1. orbits the nucleus of an atom?
  2. 2. (around 1%):What is the third most common gas found in the air we breathe?
  3. 3. is the name given to substances that are initially involved in a chemical reaction?
  4. 6. of the same chemical element that have different atomic mass are known as?
  5. 10. is the first element on the periodic table?
  6. 12. Fission:A nuclear reaction where the nucleus of an atom splits into smaller parts is known as nuclear fission or nuclear fusion?
  7. 13. or false? Acids have a pH level below 7.
  8. 17. sodium hydroxide (NaOH) an acid or base?
  9. 18. (around 78%):What is the main gas found in the air we breathe?