MASTERING BIOLOGY 9E
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ISBN: 9780136560623
Author: Campbell
Publisher: PEARSON
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Chapter 2, Problem 12TYK
The diagram below shows the arrangement of electrons around the nucleus of a fluorine and a potassium atom. What kind of bond do you think would form between these two atoms?
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The “octet rule” in chemistry helps predict the types of bonds thatatoms will form. In general, an atom will be most stable if it fills itsouter shell of 8 electrons. Atoms with fewer than 4 valence electronstend to donate electrons and those with more than 4 valence electronstend to accept additional electrons; those with exactly 4 can do both.Using this rule, determine what category each of the followingelements falls into: N, S, C, P, O, H, Ca, Fe, and Mg. (You will needto work out the valence of the atoms.)
:0-H-1--:N-H
Hydrogen Bond
Which statement best helps explain the formation of the hydrogen bond represented in the figure?
A
The oxygen has a partial positive charge, and the nitrogen has a partial negative charge.
(B)
The nitrogen has a partial negative charge, and the hydrogen attached to the oxygen has a partial positive charge.
Study figure 3.18 in the textbook. See if you can understand why some R groups are nonpolar, some polar, and others electrically charged (acidic or basic). If you were given an R group, could you place it in the correct group? Work on the R groups until you can see common elements in each category.
Chapter 2 Solutions
MASTERING BIOLOGY 9E
Ch. 2 - Fill in the blanks in this concept map to help you...Ch. 2 - Create a concept map to organize your...Ch. 2 - Changing the _____ would change it into an atom of...Ch. 2 - What is chemically nonsensical about this...Ch. 2 - A solution at pH 6 contains _____H+ than the same...Ch. 2 - Most of the unique properties of water result from...Ch. 2 - A can of cola consists mostly of sugar dissolved...Ch. 2 - Prob. 8TYKCh. 2 - In what way does the need for iodine or iron in...Ch. 2 - Use carbon-12, the most common isotope of carbon,...
Ch. 2 - In terms of electron sharing between atoms,...Ch. 2 - The diagram below shows the arrangement of...Ch. 2 - Prob. 13TYKCh. 2 - What do you think the effect on the properties of...Ch. 2 - SCIENTIFIC THINKING A recent experimental study...Ch. 2 - In agricultural areas, farmers pay close attention...Ch. 2 - This chapter explains how the emergent properties...
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