The document summarizes key concepts about chemical bonding and reactions: - Magnesium oxide and sodium chloride form ionic bonds, while carbon tetrachloride forms covalent bonds. Covalent bonds also form between combinations of nonmetals. - During chemical reactions, matter is neither created nor destroyed according to the law of conservation of mass. Chemical equations describe reactions and must be balanced. - Reactions that absorb heat are endothermic, while reactions that release heat are exothermic. Catalysts speed up reactions while inhibitors slow them down.

1. Chemical Reactions Bonding and the Periodic Table

3. Bonding:

4. What is the formula formagnesium oxide? What type of bond is it?

6. What is the formula forsodium chloride? What type of bond is it?

8. What is the formula for carbon tetrachloride? What type of bond is it?

10. Name two combinations of atoms that will form covalent bonds:

11. Name two combinations of atoms that will form an ionic bond:

12. What happens to electrons when atoms bond? Hey, how you doin’?

13. What does a chemical equation describe?

15. 18. According to the law of conservation of mass, matter is neither _____ nor _____ during chemical reactions.

16. That is why we balance equations:

17. Write the equation Balance the equation List the type of reaction Circle the reactants

18. Fe + O2 --> Fe2O3

19. PbO2 + Pb + H2OSO4 --> PbSO4 + H2O

20. AgBr + S2O3--> AgS2O3 + Br

21. CO2 + H2O -> C6H12O6 + O2 + H2O

22. If a reaction absorbs heat in order to proceed, this is called _____.

23. If a reaction produces heat, this is called _____.

24. Exothermic or Endothermic:

25. Exothermic or Endothermic:

26. Exothermic or Endothermic:

27. Exothermic or Endothermic:

28. Exothermic or Endothermic:

29. Exothermic or Endothermic:

30. Exothermic or Endothermic:

31. Exothermic or Endothermic:

32. _____ speed up reactions.

33. _____ slow down reactions.

34. What type of reaction is this? 2K + MgCl2 -> 2KCl + Mg

35. This? AB + C-> AC + B (One substance is trading places with another.)

36. This? AB -> A + B (One complex substance breaking up into two simpler substances.)

37. This? A + B -> AB (Two simpler substances combining to form a complex substance.)

38. 3Mg + N2 -> Mg3N2 If 12 g of magnesium react with an unknown amount of nitrogen to form 30 g of magnesium nitride, how many grams of nitrogen were used?

39. 3Mg + N2 -> Mg3N2 If 8 g of magnesium react with an unknown amount of nitrogen to form 12 g of magnesium nitride, how many grams of nitrogen were used?

40. 3Mg + N2 -> Mg3N2 If 18 g of magnesium react with 12 g of nitrogen to form magnesium nitride, how many grams of were produced?

41. 3Mg + N2 -> Mg3N2 If 32 g of magnesium react with 5 g of nitrogen to form magnesium nitride, how many grams of were produced?