PHYSICAL SCIENCE / CHEMICAL REACTIONS

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Across
  1. 2. COLUMNS ON THE PT
  2. 3. LEFT SIDE OF CHEMICAL EQN.
  3. 5. ROWS ON THE PT
  4. 12. CHEMICAL REACTIONS THAT GIVE OFF HEAT.
  5. 13. WHEN A CHEMICAL EQUATION IS BALANCED, THERE ARE ___ NUMBERS OF ATOMS ON BOTH SIDES.
  6. 14. NUMBER OF PROTONS IN ATOMIC NUCLEI.
  7. 17. CCl4
  8. 18. Li2O
  9. 20. ELEMENTS ON THE PT ARE ARRANGED BY ____ ATOMIC NUMBER.
  10. 22. MOST OF THE ELEMENTS ON THE PT ARE THESE.
  11. 24. SODIUM CHLORIDE
  12. 25. CHEMICAL REACTIONS THAT ABSORB HEAT.
  13. 26. CHEMICAL BOND THAT FORMS WHEN ATOMS SHARE e.
  14. 27. RIGHT SIDE OF CHEMICAL EQN.
  15. 28. A + BC => AB + C
  16. 29. SELENIUM MONOXIDE
  17. 30. A + B => AB
  18. 32. CaCl2
  19. 34. REACTION THAT OCCURS WHEN SUBSTANCES BURN IN AIR.
  20. 35. CHEMICAL EQUATIONS ARE ___ TO SHOW AMOUNTS OF REACTANTS AND PRODUCTS.
Down
  1. 1. Al2S3
  2. 4. AB + CD => AC + BD
  3. 6. WATER
  4. 7. SUM OF PROTONS AND NEUTRONS IN ATOMIC NUCLEI.
  5. 8. REQUIRED FOR ALL CHANGES.
  6. 9. WHAT HAPPENS TO ATOMS IN CHEMICAL REACTIONS.
  7. 10. CHEMICAL BOND THAT FORMS WHEN ATOMS TRANSFER e.
  8. 11. OUTERMOST ELECTRONS THAT FORM CHEMICAL BONDS.
  9. 15. USED TO BALANCE CHEMICAL EQNS.
  10. 16. NO2
  11. 19. ATOMS THAT HAVE LOST OR GAINED ELECTRON(S).
  12. 21. AB => A + B
  13. 22. MADE OF TWO OR MORE ATOMS. CAN BE SAME OR DIFFERENT.
  14. 23. MASS IS ___ IN CHEMICAL REACTIONS.
  15. 31. IF YOU SAY THIS IS TOO HARD, YOU ARE ___.
  16. 33. MADE OF TWO OR MORE DIFFERENT ELEMENTS.