Periodicity Worksheet Page 4
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42 pts EC per page
G. Concept Mastery Questions
1. The shielding effect increases with increasing atomic number within a ___.
a. period
b. group
c. both
d. neither
2. In any ___, the number of electrons between the nucleus and the outer energy level is the same.
a. period
b. group
c. both
d. neither
3. Within a ____, the nucleus has a stronger ability to pull on the outermost (valence) electrons in elements
of high atomic number.
a. period
b. group
c. both
d. neither
4. In a ____, electron affinity values become more negative as atomic number increases.
a. period
b. group
c. both
d. neither
5. The halogens are considered a ____.
a. period
b. group
c. both
d. neither
6. Which atom has the greater nuclear charge?
a. Na
b. Al
c. P
d. Ar
7. Which atom demonstrates the greatest shielding effect?
a. Na
b. Al
c. P
d. Ar
8. The atoms Na, Al, P, and Ar all have the same
a. shielding
b. atomic radius
c. #valence electrons d. #core electrons
9. Which element on the periodic table has
a. lowest ionization energy: _____
b. largest atomic radius: _____
c. highest electronegativity: _____
d. highest ionization energy: _____
10. Explain the relationship between the relative size of an ion to its atom and the charge on the ion.
11. Explain why noble gases are inert and do not form ions.
12. Will the shielding effect be more noticeable in metals or non metals? Explain your answer.
13. Why do elements in the same family generally have similar properties? Choose one as an example to
support your reasoning.
14. Arrange each of the following in order of increasing ionization energy and explain your reasoning:
Calcium, iron, copper, bromine and krypton.
15. Consider the table of the first four ionization energies for an element we will call A.
a. In which group does A appear on the periodic table?
b. What is the most likely oxidation number for element A?
c. What is the minimum number of electrons that A must have?
d. Write the valence electron sublevel configuration for this element. (sublevel and number of electrons
in them)
p−
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