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70 Chemistry: Matter and Change
Solving Problems: A Chemistry Handbook
SOLVING PROBLEMS:
A CHEMISTRY HANDBOOK
CHAPTER
7
Practice Problems
27. An unknown substance is found to be a good conductor of electricity when melted. Explain whether on this basis alone the
substance can be classified as a metal.
28. Suppose the substance in question 27 is allowed to solidify. It is
then hammered, and shatters as a result. What property is being
tested? Would you classify this material as a metal? Explain
your answer.
29. A certain sample of an element is known to be either nickel,
sulfur, or iodine. The sample is found to be a good conductor of
electricity as a solid. Which element is it likely to be? Why?
What other properties would you expect the sample to have?
30. Carbon steel is made by filling the holes in an iron crystal with
atoms of carbon. As what type of material is such a mixture
classified?
31. Brass is a mixture in which some of the atoms in a crystal of
copper are replaced by zinc atoms, which are of similar size. As
what type of material is such a mixture classified?
Chapter 7 Review
32. Define the term chemical bond. Account for such bonding in
terms of the concept of noble gas configuration.
33. Explain the difference between a cation and an anion in terms
of electron transfer. Give an example of each type of ion.
34. Define the term ionic bond. Explain how atoms of potassium
(group 1) and iodine (group 17) bond ionically with one
another.
35. Describe the arrangement of ions in ionic compounds and the
properties typical of ionic compounds.
36. Explain how to determine the formula for an ionic compound,
given its name.
37. State the rules for naming oxyanions, including those of the
halogens.
38. Describe the model for metallic bonding and explain how the
model accounts for typical metallic properties.
39. Compare and contrast substitutional and interstitial alloys.
70 Chemistry: Matter and Change
Solving Problems: A Chemistry Handbook
SOLVING PROBLEMS:
A CHEMISTRY HANDBOOK
CHAPTER
7
Practice Problems
27. An unknown substance is found to be a good conductor of electricity when melted. Explain whether on this basis alone the
substance can be classified as a metal.
28. Suppose the substance in question 27 is allowed to solidify. It is
then hammered, and shatters as a result. What property is being
tested? Would you classify this material as a metal? Explain
your answer.
29. A certain sample of an element is known to be either nickel,
sulfur, or iodine. The sample is found to be a good conductor of
electricity as a solid. Which element is it likely to be? Why?
What other properties would you expect the sample to have?
30. Carbon steel is made by filling the holes in an iron crystal with
atoms of carbon. As what type of material is such a mixture
classified?
31. Brass is a mixture in which some of the atoms in a crystal of
copper are replaced by zinc atoms, which are of similar size. As
what type of material is such a mixture classified?
Chapter 7 Review
32. Define the term chemical bond. Account for such bonding in
terms of the concept of noble gas configuration.
33. Explain the difference between a cation and an anion in terms
of electron transfer. Give an example of each type of ion.
34. Define the term ionic bond. Explain how atoms of potassium
(group 1) and iodine (group 17) bond ionically with one
another.
35. Describe the arrangement of ions in ionic compounds and the
properties typical of ionic compounds.
36. Explain how to determine the formula for an ionic compound,
given its name.
37. State the rules for naming oxyanions, including those of the
halogens.
38. Describe the model for metallic bonding and explain how the
model accounts for typical metallic properties.
39. Compare and contrast substitutional and interstitial alloys.