Periodic Trends (ps 26)
5 Questions
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Chapter 7
Questions and Answers
- 1.Which describes the behavior of potassium metal during a chemical reaction? I. Neutral atoms become ions with a 1+ charge. II. Neutral atoms take on protons III. Neutral atoms become ions with a corresponding increase in radius.
- A.
I only
- B.
I and II only
- C.
III only
- D.
II and III only
- E.
I, II, and III
- 2.Which of the following groups has the species correctly listed in order of increasing radius?
- A.
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- B.
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- C.
Br-, Cl-, F-
- D.
Na, Mg, Al
- E.
Fe, Fe2+, Fe3+
- 3.Choose the ion with the largest atomic radius.
- A.
F-
- B.
Al3+
- C.
K+
- D.
O2-
- E.
I-
- 4.In general, atomic radii decrease from left to right across a period. The main reason for this behavior is
- A.
The number of neutrons in the nucleus increases
- B.
The number of electrons increases
- C.
The atomic mass increases
- D.
The effective nuclear charge increases
- E.
The polarizability increases
- 5.The following ionization energies are reported for element X. (All values are in kJ/mol.) First: 500 Second: 4560 Third: 6910 Fourth: 9540 Fifth: 13400 Based on the above infomation, the most likely identify of X is
- A.
Mg
- B.
Cl
- C.
Al
- D.
Na
- E.
Si
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