객관식
What is the most common charge on a cobalt ion in the compound CoCl2?
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객관식
What is the charge of the ammonium ion (NH_4)?
A
0
B
+1
C
+2
D
-1
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검증된 단계별 안내1
Recall that the ammonium ion is represented as \(\mathrm{NH_4^+}\), which means it is a polyatomic ion composed of one nitrogen atom and four hydrogen atoms.
Understand that nitrogen typically has 5 valence electrons, and each hydrogen has 1 valence electron, so the total number of valence electrons before ion formation is \(5 + 4 \times 1 = 9\) electrons.
Recognize that the ammonium ion carries a positive charge, which means it has lost one electron compared to the neutral combination of nitrogen and hydrogen atoms.
Therefore, the overall charge of the ammonium ion is \(+1\), indicating it has one fewer electron than the total number of protons in the atoms combined.
Conclude that the charge of the ammonium ion \(\mathrm{NH_4}\) is \(+1\), which is why it is written as \(\mathrm{NH_4^+}\).
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