BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 2, Problem 3WIO
Summary Introduction
To draw:
The electron shells of the given atoms and predict the number of bonds each atom should form.
Introduction:
Electrons occupy distinct energetic regions around the nucleus. They are constantly in motion, so it is not possible to detect the exact location of an electron at a given moment. The electrons can be imagined as occupying a series of concentric energy shells. Each shell has a higher energy level than the one inside it.
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Complete the table below, using the diagram of an atom shown at right.
name symbol
0
proton
e
Properties of subatomic particles
charge
(in multiples of e)
0
0
0
approximate
mass
(amu)
(choose one) ✓
(choose one) ✓
1.0
location
on diagram
(choose one) ✓
(choose one) ✓
A
X
A
S
Look up the valence electron configuration, covalent atomic radius, effective nuclear charge, first ionization energy and Pauling
electronegativity in Chapter 8 (tables are attached). Examine the above data and answer the following questions.
a) Explain why some of the elements like TI and Pb on the lower left of the p block are metallic.
b) Explain why some of the elements like C, Si in the center of the p block form covalent bonds. Explain why these bonds formed
by the network of these elements (as studied in Chapter 25) tend to be unreactive.
c) Explain why the noble Group 8A elements are highly unreactive gases.
d) Explain why some elements like F, CI, Br etc, on the upper right of the p block are highly reactive nonmetals.
Chlorine is an element with the symbol Cl. Draw and label atomic structure of chlorine indicating the number and locations of protons, neutrons and electrons in one atom of chlorine.
Chapter 2 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 2.1 - Which four chemical elements do organisms require...Ch. 2.1 - Prob. 2MCCh. 2.1 - Prob. 3MCCh. 2.1 - Prob. 4MCCh. 2.1 - How are the isotopes of an element different from...Ch. 2.2 - How are atoms, molecules, and compounds related?Ch. 2.2 - How does the number of valence electrons determine...Ch. 2.2 - Prob. 3MCCh. 2.3 - Prob. 1MCCh. 2.3 - Prob. 2MC
Ch. 2.3 - Prob. 3MCCh. 2.3 - Prob. 4MCCh. 2.3 - Prob. 5MCCh. 2.3 - Prob. 6MCCh. 2.4 - Prob. 1MCCh. 2.4 - Prob. 2MCCh. 2.4 - Prob. 3MCCh. 2.5 - Prob. 1MCCh. 2.5 - Prob. 2MCCh. 2.5 - Prob. 3MCCh. 2.5 - What are some differences between RNA and DNA?Ch. 2.5 - Prob. 5MCCh. 2.5 - Prob. 6MCCh. 2.5 - List an example of a carbohydrate, protein,...Ch. 2 - Prob. 1MCQCh. 2 - How many neutrons does a carbon-14 atom have in...Ch. 2 - An ionic bond forms when a. an electrical...Ch. 2 - Prob. 4MCQCh. 2 - Prob. 5MCQCh. 2 - A hydrogen bond is distinct from ionic and...Ch. 2 - A hydrophilic substance is one that can a. form...Ch. 2 - Prob. 8MCQCh. 2 - Prob. 9MCQCh. 2 - ______ are monomers that form polymers called...Ch. 2 - Describe how the number of protons, neutrons, and...Ch. 2 - The vitamin biotin contains 10 atoms of carbon, 16...Ch. 2 - Prob. 3WIOCh. 2 - Distinguish between nonpolar covalent bonds, polar...Ch. 2 - Prob. 5WIOCh. 2 - Prob. 6WIOCh. 2 - Prob. 7WIOCh. 2 - Prob. 8WIOCh. 2 - Prob. 9WIOCh. 2 - Define solute, solvent, and solution.Ch. 2 - How do hydrogen ions relate to the pH scale?Ch. 2 - Prob. 12WIOCh. 2 - Prob. 13WIOCh. 2 - Prob. 14WIOCh. 2 - Complete and explain the following analogy: a...Ch. 2 - Prob. 16WIOCh. 2 - You eat a sandwich made of starchy bread, ham, and...Ch. 2 - Prob. 18WIOCh. 2 - Review Burning Question 2.2, which describes the...Ch. 2 - Review Why We Care 2.1, which describes acids and...Ch. 2 - Compare the Survey the Landscape figure in the...Ch. 2 - How do ions and isotopes fit into this concept...Ch. 2 - Prob. 3PITCh. 2 - Prob. 4PIT
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