Multiple Choice
An atom or group of bonded atoms that has a positive or negative charge is called a/an:
2
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2. Atoms & Elements
Ions
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What is the most common charge of the copper(II) ion?
A
0
B
+1
C
-1
D
+2
Verified step by step guidance1
Understand that the Roman numeral in the name of a transition metal ion indicates its oxidation state or charge. For copper(II), the (II) means the ion has a charge of +2.
Recall that copper can have multiple common oxidation states, typically +1 and +2, but the Roman numeral specifies which one is being referred to.
Recognize that the charge of the copper(II) ion is therefore +2, as indicated by the (II) in its name.
Note that the other options (+1, 0, -1) do not correspond to the copper(II) ion's charge.
Conclude that the most common charge of the copper(II) ion is +2.
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