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Anions
Names
Next let's deal with the nonmetals. They gain electrons to become
anions.
| The halogens - fluorine, chlorine, bromine, and iodine - become anions with a negative one charge. To name these negatively charged ions we
change the ending of the name of the element to "-ide" - fluoride, chloride,
bromide and iodide ions. Oxygen, sulfur, and the other nonmetallic elements in that family will gain
two electrons. The names of these negative ions also have an "-ide" ending -
oxide, sulfide, selenide, telluride ions.
In the next group over, nitrogen, phosphorus and arsenic can take on three electrons to
become nitride, phosphide and arsenide ions. |
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We learned that carbon does not
have a strong enough attraction for electrons to become a carbide ion by gaining
four electrons. We also learned that hydrogen will sometimes gain one electron to become a hydride ion with a negative one
charge.
Practice with Names of Anions
Take time now to get some practice with anions by working on the following exercise
(also shown in your workbook in exercise 4). Check your answers on the following page or
with the instructor.
| Nonmetal |
Anion
Formula |
Anion
Name |
| N |
|
|
| O |
|
|
| S |
|
|
| Cl |
|
|
| Br |
|
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Answers
| Nonmetal |
Anion
Formula |
Anion
Name |
| N |
N3- |
nitride ion |
| O |
O2- |
oxide ion |
| S |
S2- |
sulfide ion |
| Cl |
Cl- |
chloride ion |
| Br |
Br- |
bromide ion |
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E-mail instructor:
Eden Francis
Clackamas Community College
©1998, 2002 Clackamas Community College, Hal Bender
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