1. Active Lecture Questions for BIOLOGY, Eighth Edition Neil Campbell & Jane Reece Questions prepared by William Wischusen, Louisiana State University Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. Chapter 2 The Chemical Context of Life

2. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. Based on the periodic table shown here, which elements will most likely form an ionic bond? a)Na and Cl b)Li and F c)C and O d)N and O e)Si and Cl

3. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. Based on the periodic table shown here, which elements will most likely form a polar covalent bond? a)Na and Cl b)C and O c)N and O d)Si and Cl e)H and H

4. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. Based on the periodic table shown here, which elements will most likely form a covalent bond? a)Na and Cl b)C and O c)N and O d)Si and Cl e)H and H

5. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. What do elements with atomic numbers 6, 14, and 22 have in common? a)same number of electrons b)same atomic mass c)same valence d)will form the same number of bonds

6. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. Living systems differ from nonliving systems in that a)living systems are composed largely of unusual elements. b)living systems are composed largely of elements with large (high) atomic numbers. c)living systems contain large percentages (greater than 10%) of nine elements. d)living systems combine simple elements in unique combinations.

7. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. Water is a polar molecule because of the presence of ___________ bonds. a)ionic b)covalent c)polar covalent d)hydrogen e)More than one of the above options is correct.

8. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings. The force of the chemical bond (the attraction between the different elements) a)is an electrical attraction. b)is a unique chemical attraction. c)results from the sharing of electrons. d)results from atoms filling their outermost valence shell.