Chapter 08 – Periodic Relationships Among the Elements
Chapter 08
Periodic Relationships Among the Elements
1. The law of octaves was proposed by
2. The law of octaves states that every eighth element has similar properties when arranged in
order of increasing
Chapter 08 – Periodic Relationships Among the Elements
3. As opposed to early periodic tables based on the law of octaves, modern periodic tables
arrange the elements in order of increasing
4. Mendeleev proposed the existence of an unknown element that he called eka-aluminum.
This element is now called
Chapter 08 – Periodic Relationships Among the Elements
5. The chief contribution of physicist Henry Moseley to atomic theory was
6. The elements in Group 7A are known by what name?
7. The elements in Group 2A are known by what name?
Chapter 08 – Periodic Relationships Among the Elements
8. The alkali metal elements are found in _______ of the periodic table.
9. Which one of the following elements is a Lanthanide?
10. Which one of the following elements is a transition element?
Chapter 08 – Periodic Relationships Among the Elements
11. Which of the following elements is found as a monatomic species in its most stable form?
12. Which of the following elements is found as a monatomic species in its most stable form?
13. Which of the following elements is found as a diatomic species in its most stable form?
14. Which of the following is the general electron configuration for the outermost electrons of
the elements in Group 5A?
15. Which of the following is the general electron configuration for the outermost electrons of
elements in the alkaline earth group?
Chapter 08 – Periodic Relationships Among the Elements
16. Which of the following is the general electron configuration for the outermost electrons of
the halogens?
17. Which of the following is the general electron configuration for the outermost electrons of
the noble gases?
Chapter 08 – Periodic Relationships Among the Elements
18. An element with the general electron configuration for its outermost electrons of ns2np1
would be in which element group?
19. In what row and group of the periodic table would you find the element with the electron
configuration [Kr]5s24d105p2?
Chapter 08 – Periodic Relationships Among the Elements
20. Consider the element with the electron configuration [Kr]5s24d7. This element is
21. Consider the element with the electron configuration [Kr]5s24d105p5. This element is
Chapter 08 – Periodic Relationships Among the Elements
22. Consider the element with the electron configuration [Xe]6s24f7. This element is
23. The representative elements are those with unfilled energy levels in which the “last
electron” was added to
Chapter 08 – Periodic Relationships Among the Elements
24. How many valence electrons does S2- have?
25. How many valence electrons does P3- have?
Chapter 08 – Periodic Relationships Among the Elements
26. How many electrons does a sulfur atom need to fill its outermost s and p subshells?
27. How many electrons does a nitrogen atom need to fill its outermost s and p subshells?
28. How many electrons does a bromine atom need to fill its outermost s and p subshells?
Chapter 08 – Periodic Relationships Among the Elements
29. How many electrons are in the 4p subshell of selenium?
30. How many electrons are in the 4p subshell of vanadium?
31. How many core electrons does a chlorine atom have?
Chapter 08 – Periodic Relationships Among the Elements
32. How many core electrons does a silicon atom have?
33. Concerning the electron configuration of fluorine, 1s22s22p5 which of the following
represents the core electrons only?
Chapter 08 – Periodic Relationships Among the Elements
34. Concerning the electron configuration of sulfur, 1s22s22p63s23p4, which of the following
represents the core electrons only?
35. Concerning the electron configuration of aluminum, 1s22s22p63s23p1, which of the
Chapter 08 – Periodic Relationships Among the Elements
36. Which one of the following elements forms a stable 3- anion?
37. Which one of the following elements forms a stable 1- anion?
Chapter 08 – Periodic Relationships Among the Elements
38. Which one of the following elements forms a stable 2+ cation?
39. Which two electron configurations represent elements that would have similar chemical
properties?
(1) 1s22s22p4 (2) 1s22s22p5 (3) [Ar]4s23d5 (4) [Ar]4s23d104p5
Chapter 08 – Periodic Relationships Among the Elements
40. Which of the following make an isoelectronic pair: Cl–, O2–, F, Ca2+, Fe3+?
Chapter 08 – Periodic Relationships Among the Elements
42. Which one of the following is not isoelectronic with the others: Br–, Rb+, Se2–, Sr2+, Te2–?
43. Which ion is isoelectronic with Ar?
Chapter 08 – Periodic Relationships Among the Elements
44. Which one of the following is not isoelectronic with Kr?
45. Which of the following is the electron configuration for the aluminum ion?