Review Questions

1. Review Questions

2. 1. The atomic number indicates __________. A. the number of neutrons in a nucleus B. the total number of neutrons and protons in a nucleus C. the number of protons in a neutral atom D. the number of atoms in 1 g of an element

3. 1. The atomic number indicates __________. A. the number of neutrons in a nucleus B. the total number of neutrons and protons in a nucleus C. the number of protons in a neutral atom D. the number of atoms in 1 g of an element

4. 2. Who is responsible for discovering the neutron? A. Rutherford B. Chadwick C. Thomson D. None of the above

5. 2. Who is responsible for discovering the neutron? A. Rutherford B. Chadwick C. Thomson D. None of the above

6. 3. In the symbol, x 6C, x is __________. A. the number of neutrons B. the atomic number C. the mass number D. the isotope number

7. 3. In the symbol, x 6C, x is __________. A. the number of neutrons B. the atomic number C. the mass number D. the isotope number

8. 4. Which scientist’s form of organizing the periodic table was called the “Law of Octaves”? A. Mendeleev B. Moseley C. Dobereiner D. Newlands

9. 4. Which scientist’s form of organizing the periodic table was called the “Law of Octaves”? A. Mendeleev B. Moseley C. Dobereiner D. Newlands

10. 5. Which isotope has 45 neutrons? A. 8036Kr B. 8035Br C. 7834Se D. 3417Cl

11. 5. Which isotope has 45 neutrons? A. 8036Kr B. 8035Br C. 7834Se D. 3417Cl

12. 6. A sample of element X contains 90% X-35 atoms, 8.0% X-37 atoms, and 2.0% X-38 atoms. The average atomic mass will be closest to which value? a. 35 c. 37 b. 36 d. 38

13. 6. A sample of element X contains 90% X-35 atoms, 8.0% X-37 atoms, and 2.0% X-38 atoms. The average atomic mass will be closest to which value? a. 35 c. 37 b. 36 d. 38

14. 7. The size of an element’s atomic radius __________ from left to right across the periodic table. a. increases b. decreases c. remains constant d. is randomly assigned

15. 7. The size of an element’s atomic radius __________ from left to right across the periodic table. a. increases b. decreases c. remains constant d. is randomly assigned

16. 8. Arrange the following elements from lowest to highest ionization energy: Be, Mg, Ca, Rb, Sr a. Be, Mg, Ca, Rb, Sr b. Rb, Sr, Ca, Be, Mg c. Rb, Sr, Ca, Mg, Be d. Be, Mg, Ca, Sr, Rb

17. 8. Arrange the following elements from lowest to highest ionization energy: Be, Mg, Ca, Rb, Sr a. Be, Mg, Ca, Rb, Sr b. Rb, Sr, Ca, Be, Mg c. Rb, Sr, Ca, Mg, Be d. Be, Mg, Ca, Sr, Rb

18. 9. How many electrons are in an Iron atom? A. 23 B. 26 C. 27 D. 28

19. 9. How many electrons are in an Iron atom? A. 23 B. 26 C. 27 D. 28

20. 10. An iron atom has an atomic mass of 56. Its atomic number is 26. How many neutrons does the iron atom have? a. 30 b. 56 c. 26 d. 82

21. 10. An iron atom has an atomic mass of 56. Its atomic number is 26. How many neutrons does the iron atom have? a. 30 b. 56 c. 26 d. 82

22. 11. In the Plum Pudding Model, the plums are _________, while the pudding is ___________. a. positive, negative b. negative, positive c. positive, positive d. negative, negative

23. 11. In the Plum Pudding Model, the plums are _________, while the pudding is ___________. a. positive, negative b. negative, positive c. positive, positive d. negative, negative

24. 12. Clorine (Cl) is best described as a a. Nonmetal b. Metalloid c. Metal d. Semimetal

25. 12. Clorine (Cl) is best described as a a. Nonmetal b. Metalloid c. Metal d. Semimetal

26. 13. All atoms of an element have the same a. number of neutrons b. atomic number c. atomic mass d. mass number

27. 13. All atoms of an element have the same a. number of neutrons b. atomic number c. atomic mass d. mass number

28. 14. An element consists of two isotopes. The abundance of one isotope is 95.72% and its atomic mass is 114.9041. The atomic mass of the second isotope is 112.9043. What is the average atomic mass of the element? a. 113.9 b. 113.0 c. 112.9 d. 114.8

29. 14. An element consists of two isotopes. The abundance of one isotope is 95.72% and its atomic mass is 114.9041. The atomic mass of the second isotope is 112.9043. What is the average atomic mass of the element? a. 113.9 b. 113.0 c. 112.9 d. 114.8

30. 15. How many protons are in the nucleus of an atom of beryllium? a. 2 b. 9 c. 4 d. 5

31. 15. How many protons are in the nucleus of an atom of beryllium? a. 2 b. 9 c. 4 d. 5

32. 16. Of Fe, K, P, and Cl, which would you expect to have the greatest electron affinity? a. K b. Fe c. Cl d. P

33. 16. Of Fe, K, P, and Cl, which would you expect to have the greatest electron affinity? a. K b. Fe c. Cl d. P

34. 17. What scientists is called the ‘Father of the Periodic Table”? a. Moseley b. Rutherford c. Millikan d. Mendeleev

35. 17. What scientists is called the ‘Father of the Periodic Table”? a. Moseley b. Rutherford c. Millikan d. Mendeleev

36. 18. What do Lithium and Berrylium have in common? a. In the same group b. In the same period c. Same number of electrons d. Same number of protons

37. 18. What do Lithium and Berrylium have in common? a. In the same group b. In the same period c. Same number of electrons d. Same number of protons

38. 19. Which symbols represent atoms that are isotopes? a. C-14 and N-14  b. O-16 and O-18  c. I-131 and I-131 d. Rn-222 and Ra-222

39. 19. Which symbols represent atoms that are isotopes? a. C-14 and N-14  b. O-16 and O-18  c. I-131 and I-131 d. Rn-222 and Ra-222

40. 20. Who has been your best science teacher? a. Ms. Swopes b. Ms. Swopes c. Ms. Swopes d. Cierra C. Swopes

41. 20. Who has been your best science teacher? a. Ms. Swopes b. Ms. Swopes c. Ms. Swopes d. Cierra C. Swopes