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General Chemistry Principles, Patterns, and Applications, 2011

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a. chlorine<br />

b. silicon<br />

c. sc<strong>and</strong>ium<br />

21. How many unpaired electrons does each species contain?<br />

a. lead<br />

b. cesium<br />

c. copper<br />

d. silicon<br />

e. selenium<br />

22. How many unpaired electrons does each species contain?<br />

a. helium<br />

b. oxygen<br />

c. bismuth<br />

d. silver<br />

e. boron<br />

23. For each element, give the complete electron configuration, draw the valence electron configuration, <strong>and</strong><br />

give the number of unpaired electrons present.<br />

a. lithium<br />

b. magnesium<br />

c. silicon<br />

d. cesium<br />

e. lead<br />

24. Use an orbital diagram to illustrate the aufbau principle, the Pauli exclusion principle, <strong>and</strong> Hund’s rule for<br />

each element.<br />

a. carbon<br />

b. sulfur<br />

A N S W E R S<br />

Saylor URL: http://www.saylor.org/books<br />

Saylor.org<br />

583

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