Paying Attention to the Details
Sometimes two or more answers to a question are almost identical. If you do not read the answers carefully, you may select an incorrect answer by mistake. In the question below, all the answers include the correct elements in the correct order—metal before nonmetal. However, only one of the answers uses the correct rules for naming CaCl2.
The name for the compound with the formula CaCl2 is
calcium(II) chloride.
calcium chlorine.
calcium dichloride.
calcium chloride.
monocalcium dichloride.
(Answer: D)
Choose the letter that best answers the question or completes the statement.
How many electrons does a Group 7A atom need to gain in order to achieve a stable electron configuration?
0
1
2
7
8
What type of bond forms when electrons are transferred from one atom to another?
nonpolar covalent bond
ionic bond
polar covalent bond
polyatomic bond
metallic bond
Metallic bonds form between
cations and protons.
anions and protons.
cations and anions.
cations and electrons.
anions and electrons.
Use the table to answer Questions 4 and 5.
Some Ions and Their Symbols |
|||
---|---|---|---|
Ion Name |
Ion Symbol |
Ion Name |
Ion Symbol |
Copper(I) |
Cu+ |
Nitrate |
NO3− |
Copper(II) |
Cu2+ |
Sulfate |
SO42− |
Iron(II) |
Fe2+ |
Carbonate |
CO32− |
Iron(III) |
Fe3+ |
Phosphate |
PO43− |
What is the formula for copper(II) nitrate?
CuNO3
Cu2(NO3)2
Cu(NO3)2
Cu2NO3
CuNO2
In the compound iron(II) carbonate, the ratio of iron(II) ions to carbonate ions will be
one to one.
two to one.
three to one.
one to two.
one to three.
All steels contain
copper and zinc.
copper and tin.
iron and chromium.
chromium and carbon.
iron and carbon.
What is the reason that water has a higher boiling point than expected?
Attractions among nonpolar water molecules are strong.
Water molecules have a linear shape.
Water molecules are not very massive.
There are strong attractions among polar water molecules.
There are no attractions among water molecules.