객관식
Metal ions always have what type of charge?
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2. Atoms & Elements
Periodic Table: Charges
Multiple Choice
What is the charge on the copper ion in the compound CuF_2?
A
+2
B
+1
C
0
D
+3
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검증된 단계별 안내1
Identify the overall charge of the compound CuF_2, which is neutral (0 charge).
Recall that fluorine (F) typically has a charge of -1 in ionic compounds.
Since there are two fluorine atoms, calculate the total negative charge contributed by fluorine: \(2 \times (-1) = -2\).
Let the charge on the copper ion be \(x\). Write the charge balance equation for the compound: \(x + 2(-1) = 0\).
Solve the equation for \(x\) to find the charge on the copper ion: \(x - 2 = 0 \Rightarrow x = +2\).
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