Science 9 Chemistry Crossword

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Across
  1. 3. The maximum number of electrons in the 2nd energy shell
  2. 5. Mr. Saroya's first name
  3. 7. The vertical columns on a periodic table
  4. 9. Number of energy shells in a calcium atom
  5. 13. Another name for sodium bicarbonate
  6. 15. Name of element that contains 10 electrons
  7. 16. Last name of the "Father of Chemistry"
  8. 17. Atoms in a covalent compound ____ electrons
  9. 18. The lustre of something is a ____ property
  10. 19. Atomic size _____ moving down the periodic table
  11. 20. Name of group 1 on the periodic table
Down
  1. 1. The horizontal rows on a periodic table
  2. 2. An ion has a ____ but an atom does not
  3. 3. A negatively charged subatomic particle
  4. 4. Noble gases have a ____ valence shell
  5. 6. Name of element that contains 11 electrons
  6. 8. The atomic number is also the number of ____
  7. 10. The size of an atom is also called the atomic ____
  8. 11. The most stable group on the periodic table
  9. 12. Type of electron in the outermost shell
  10. 14. A diatomic element NOT part of the "7" on the periodic table
  11. 16. The "staircase" on the periodic table separates the non-metals and ____
  12. 21. The maximum number of electrons in the 1st energy shell