Chemistry Crossword

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Across
  1. 3. What is the centre of an atom called?
  2. 5. What is the positive charge in an atom?
  3. 7. What will happen to the pressure inside of a sealed tube if you raise the temperature?
  4. 9. True or false? Bases have a pH level below 7.
  5. 10. Name a force that keeps molecules together.
  6. 13. K is the chemical symbol for which element?
  7. 16. What is the first element on the periodic table?
  8. 18. What is the name of the compound NaCl?
  9. 19. How many electrons in a Hydrogen (H) atom?
  10. 21. True or false? Acids have a pH level below 7.
  11. 23. Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field?
  12. 25. Which is an example of a crystal lattice?
  13. 27. What is H20 more commonly known as?
  14. 28. What is the scientific name of water in a gas form?
Down
  1. 1. How many neutrons in a Hydrogen (H) atom?
  2. 2. What is the third most common gas found in the air we breathe?
  3. 4. What is the negative charge in an atom?
  4. 6. What has no electrical charge in the atom?
  5. 8. What orbits the nucleus of an atom?
  6. 10. What do the letters "amu" stand for?
  7. 11. True or false? A proton carries a positive charge.
  8. 12. Atoms of the same chemical element that have different atomic mass are known as?
  9. 14. What is the chemical symbol for gold?
  10. 15. How many atoms are in a water molecule?
  11. 17. What is the main gas found in the air we breathe?
  12. 20. At room temperature, what is the only metal that is in liquid form?
  13. 22. Can an element be broken down into a simpler substance?
  14. 24. What is the name given to substances that are initially involved in a chemical reaction?
  15. 26. Is sodium hydroxide (NaOH) an acid or base?