9 week exam Review

1. 9 week exam Review

3. Question 1 - 10 • The modern periodic table lists elements in order of increasing atomic________.

4. Answer 1 – 10 Number

5. Question 1 - 20 • Describe Mendeleev’s periodic table.

6. Answer 1 – 20 He arranged elements in order of increasing atomic mass.

7. Question 1 - 30 Why is Mendeleev the “Father of the Modern Periodic Table” and not Meyer or both?

8. Answer 1 – 30 • Mendeleev correctly predicted physical properties of three unknown elements.

9. Question 1 - 40 How did Moseley update the Periodic Table?

10. Answer 1 – 40 After calculating the atomic number of elements, he rearranged the PT by increasing atomic number.

11. Question 1 - 50 • Assess the contributions of Mendeleev and Moseley to our modern understanding of the relationship between atomic structure and atomic behavior.

12. Answer 1 – 50 • Mendeleev’s PT was able to show that groups/families of elements have similar properties depending on the size of the nucleus. (able to predict properties of atomic behavior based on guessed atomic mass) • Moseley expanded upon Mendeleev’s ideas with atomic number (number of protons) defining an atom and its properties.

13. Question 2 - 10 What is the trend for metallic reactivity across a period? (for example from sodium, to magnesium, then aluminum?)

14. Answer 2 – 10 • Chemical reactivity of metals generally decreases across a period.

15. Question 2 - 20 • What is ionization energy?

16. Answer 2 – 20 • Amount of energy needed to remove an electron to form a cation.

17. Question 2 - 30 • Describe the trend across a period and down a group for electronegativity.

18. Answer 2 – 30 • The trend across a period for electronegativity increases. It decreases as it goes down a group.

19. Question 2 - 40 • What is the trend for atomic radius on the periodic table?

20. Answer 2 – 40 • It decreases across a period and increases down a group.

21. Question 2 - 50 What is the most electronegative element, and what is its value?

22. Answer 2 – 50 Fluorine, 4.0

23. Question 3 - 10 • Where are the metals located on the periodic table?

24. Answer 3 – 10 • To the left and cover most of the periodic table.

25. Question 3 - 20 • What type of element is Tungsten?

26. Answer 3 – 20 • Transition metal

27. Question 3 - 30 What is a metalloid?

28. Answer 3 – 30 Solids that are semi-conductors that have properties in between metals and non-metals. Located on the staircase.

29. Question 3 - 40 • Give 3 characteristics of a nonmetal

30. Answer 3 – 40 Gases at room temp/brittle if solid Low melting/boiling points Non-conductors

31. Question 3 - 50 • Describe metals’ role in bonding. (how do they bond?)

32. Answer 3 – 50 • They form cations (positive ions) by losing electrons (transfer to nonmetals). Therefore, they participate in ionic bonding.

33. Question 4 - 10 The main energy levels of an atom are indicated by the_________.

34. Answer 4 – 10 • Principal quantum numbers.

35. Question 4 - 20 At n=2, the total number of electrons that could be found is____.

36. Answer 4 – 20 8 electrons.

37. Question 4 - 30 • Which principle states that no two electrons in the same atom can have the same set of quantum numbers?

38. Answer 4 – 30 • Pauli exclusion

39. Question 4 - 40 • What is the electron configuration for aluminum?

40. Answer 4 – 40 1s22s22p63s23p1

41. Question 4 - 50 • What are the 4 quantum numbers for Sulfur?

42. Answer 4 – 50 3, 1, -1, -1/2

43. Question 5 - 10 What are three properties of a covalent compound?

44. Answer 5 – 10 • Low melting/boiling points • Non-conductors • Wide variety of textures • Do not form crystals

45. Question 5 - 20 • What shape will NH3 exhibit?

46. Answer 5 – 20 • Trigonal pyramidal

47. Question 5 - 30 The model used to describe and explain the bonding and arrangement of atoms in a solid metal is the_______

48. Answer 5 – 30 • Electron sea/sea of electrons model

49. Question 5 - 40 • What type of bonding exists between nitrogen and hydrogen?

50. Answer 5 – 40 • Polar-covalent bond