Q4 FINAL EXAM Study Guide: Chapter 5



Q4 Midterm EXAM Study Guide: Chapter 5.2, 5.3, 6.1, and 6.2

Please do not write on this paper. Using your OWN paper answer each question completely.

1. In a modern periodic table, elements are arranged in order of ________________________

2. What is periodic law?

3. What four types of information are given in each element’s box on the periodic table?

4. What is the atomic mass or atomic weight of an element?

5. What is a weighted average?

6. Most elements exist as a mixture of two or more _________.

7. What are the three categories into which elements are classified based on their general properties?

8. What are some properties of nonmetals?

9. What are valence electrons?

10. How many valence electrons do atoms of oxygen have? Sodium? Neon? Calcium? Chlorine? Carbon?

11. Elements in a group have similar properties because they have the same number of ________ ________.

12. Alkali metals are extremely reactive which is why they are found in nature only in ___________.

13. The Alkaline earth metals are in group ______ and have _________ valence electrons.

14. Magnesium is often used in ________ and _____ because it is strong and light weight.

15. ___________ is the main ingredient in chalk, limestone, coral and pearl.

16. Group 4A is known as the ___________family. Elements in this group have ____________ valence electrons.

17. Fertilizers often contain _________________ and _________________

18. Elements in group 7A are called _________ and they each have _______ valence electrons

19. Which halogen is the most reactive? Second?

20. The noble gases are ________, ________ and _______________________.

21. How many valence electrons does the noble gas neon have?

22. What is a chemical bond?

23. What is an ionic bond?

24. What is an ion? What is an anion? A cation?

25. When does an ionic bond form?

26. When the highest occupied energy level of an atom is filled with electrons, the atom is _______ and ____________________________.

27. What is a chemical formula?

28. Do elements become more stable or less stable after they form an ionic bond?

29. What are two factors that determine the arrangement of ions in an ionic crystal?

30. What is a covalent bond?

31. What is a molecule?

32. What does the space-filing molecular model and electron cloud model show that the electron dot diagram does not?

33. How are atoms held together in a covalent bond?

34. When two atoms share three pairs of electrons the bond is called a _________ _________. What is it called when they share two pairs of electrons? One pair?

35. In a group of elements in the periodic table, which ones have a greater attraction for the electrons? Top or bottom?

36. What is a polar covalent bond?

37. In a molecule of a compound, are electrons always shared equally by both atoms?

38. When atoms form a polar covalent bond, the atom with the greater attraction for electrons has a partial ___________charge and the other atom has a partial ___________ charge.

39. What determines whether a molecule is polar or nonpolar?

40. Why does water have a higher boiling point than carbon dioxide?

41. Using the lewis structures below, write out how many valence electrons each element has.

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