Chemical Principles
8th Edition
ISBN: 9781305581982
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 32E
Distinguish between the following terms.
a. molecule versus ion
b. covalent bonding versus ionic bonding
c. molecule versus compound
d. anion versus cation
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Multiple Choice
|1. Ions that are formed from one atom are known as
a. polyatomic ions.
b. monatomic ions.
c. cations.
d. anions.
2. A group of atoms united by covalent bonds is a(an)
a. cation.
b. molecule.
c. ionic compound.
d. octet.
3. Ionic compounds are always
a. electrically neutral.
b. made up of atoms that share electrons
c. polyatomic cations.
d. the same as molecules.
4. To form a bond, atoms share
a. neutrons.
b. protons.
c. inner-shell electrons.
d. valence electrons.
5. A positively charged ion attracts a(an)
a. neutral jon.
b. cation.
c. anion.
d. proton.
6. Ionic compounds
a. have high melting points.
b. are brittle.
c. are good conductors in their liquid state.
d. all of the above.
7. During a chemical reaction,
a. new elements are produced.
b. atoms are destroyed.
c. atoms are rearranged.
d. elements are destroyed.
|8. An equation is balanced by
a. changing subscripts.
b. erasing elements as necessary.
c. adding coefficients.
d. adding elements as necessary.
9. A…
Part 1: Nomenclature
What are covalent compounds (molecules)? Give two examples of covalent compounds and their formula.
What are binary ionic compounds (formula units)? Give two examples of binary ionic compounds and their formula
What is the difference between naming of cations with variable charge and compounds with fixed charge? Give two examples of each and their formula
What are polyatomic ions? Give two examples of polyatomic ions and their formula
Give two examples of compounds containing polyatomic ions and their formula
Give an example of names of binary acids (not containing a polyatomic ion) in aqueous solution and its formula.
Give an example of an oxyacid (containing a polyatomic ion) inn aqueous solution and its formula.
Part 2: Structure, Shape and polarity
Draw the Lewis structure of PH3
draw the electronic geometry and name the geometry (hint: very similar to NH3)
draw the molecular geometry and name the…
Ionic compounds do not consist of molecules, but covalent compounds generally do.
Why is it incorrect to refer to a molecule of an ionic compound?
As part of your answer, draw two scenes, representing atoms as circles:
a. Draw at least 6 copies of NaCl showing how it is bonded.
b. Draw at least 6 copies of BrCl showing how it is bonded.
Then explain what is meant by a molecule and why it is correct to state that most
covalent compounds exist as molecules, but ionic compounds do not exist as
molecules.
Take a picture of your drawing and explanation and insert it in the answer box.
Chapter 2 Solutions
Chemical Principles
Ch. 2 - You may have noticed that when water boils, you...Ch. 2 - Which of the following is true about an individual...Ch. 2 - How would you go about finding the number of...Ch. 2 - These questions concern the work of J. J. Thomson:...Ch. 2 - Heat is applied to an ice cube in a closed...Ch. 2 - You have a chemical in a sealed glass container...Ch. 2 - Prob. 7DQCh. 2 - One of the best indications of a useful theory is...Ch. 2 - Prob. 9DQCh. 2 - How does Dalton’s atomic theory account for each...
Ch. 2 - What refinements had to be made in Dalton’s...Ch. 2 - Which (if any) of the following can be determined...Ch. 2 - The average mass of a carbon atom is 12.011....Ch. 2 - Which of the following explain how an ion is...Ch. 2 - Prob. 15DQCh. 2 - Prob. 16DQCh. 2 - Why is calcium dichloride not the correct...Ch. 2 - Explain the law of conservation of mass, the law...Ch. 2 - Prob. 19ECh. 2 - When mixtures of gaseous H2 and gaseous Cl2 react,...Ch. 2 - Observations of the reaction between nitrogen gas...Ch. 2 - Prob. 22ECh. 2 - Hydrazine, ammonia, and hydrogen azide all contain...Ch. 2 - Consider 80.0-g samples of two different compounds...Ch. 2 - Early tables of atomic weights (masses) were...Ch. 2 - What evidence led to the conclusion that cathode...Ch. 2 - Prob. 27ECh. 2 - Prob. 28ECh. 2 - A chemist in a galaxy far, far away performed the...Ch. 2 - Do the proton and the neutron have exactly the...Ch. 2 - Consider Ernest Rutherford’s a-particle...Ch. 2 - Distinguish between the following terms. a....Ch. 2 - What is the distinction between atomic number and...Ch. 2 - Prob. 34ECh. 2 - a. List the noble gas elements. Which of the noble...Ch. 2 - Consider the elements of the carbon family: C, Si,...Ch. 2 - Prob. 37ECh. 2 - The number of protons in an atom determines the...Ch. 2 - For lighter, stable isotopes, the ratio of the...Ch. 2 - For each of the following sets of elements, label...Ch. 2 - Prob. 41ECh. 2 - Write the atomic symbol (ZAX) for each of the...Ch. 2 - Prob. 43ECh. 2 - Prob. 44ECh. 2 - Prob. 45ECh. 2 - Prob. 46ECh. 2 - Would you expect each of the following atoms to...Ch. 2 - Prob. 48ECh. 2 - The compounds AlCl3,CrCl3,andICl3 have similar...Ch. 2 - Each of the following compounds has three...Ch. 2 - Prob. 51ECh. 2 - Prob. 52ECh. 2 - Prob. 53ECh. 2 - Prob. 54ECh. 2 - Prob. 55ECh. 2 - Prob. 56ECh. 2 - Prob. 57ECh. 2 - Prob. 58ECh. 2 - Prob. 59ECh. 2 - Prob. 60ECh. 2 - Prob. 61ECh. 2 - Prob. 62AECh. 2 - Prob. 63AECh. 2 - What discoveries were made by J. J. Thomson,...Ch. 2 - Prob. 65AECh. 2 - Prob. 66AECh. 2 - A sample of chloroform is found to contain 12.0 g...Ch. 2 - In a reaction, 34.0 g of chromium(III) oxide...Ch. 2 - Prob. 69AECh. 2 - Prob. 70AECh. 2 - Prob. 71AECh. 2 - Prob. 72AECh. 2 - Prob. 73AECh. 2 - Prob. 74AECh. 2 - Prob. 75AECh. 2 - Prob. 76AECh. 2 - Prob. 77AECh. 2 - Prob. 78AECh. 2 - Prob. 79AECh. 2 - Identify each of the following elements. a. a...Ch. 2 - A certain element has only two naturally occurring...Ch. 2 - Prob. 82AECh. 2 - Which of the following is(are) correct? a. 40Ca2+...Ch. 2 - Prob. 84AECh. 2 - Prob. 85AECh. 2 - Complete the following table to predict whether...Ch. 2 - Which of the following statements is(are) correct?...Ch. 2 - Prob. 88CPCh. 2 - Each of the statements below is true, but Dalton...Ch. 2 - You take three compounds, each consisting of two...Ch. 2 - Two elements, R and Q, combine to form two...Ch. 2 - A single molecule has a mass of 7.3110223g ....Ch. 2 - A combustion reaction involves the reaction of a...Ch. 2 - You have two distinct gaseous compounds made from...Ch. 2 - You have gone back in time and are working with...
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