Multiple Choice
Which of the following pairs of ions are isoelectronic with each other?
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2. Atoms & Elements
Ions
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What is the net ionic charge of a calcium ion (Ca^{2+})?
A
+2
B
0
C
+1
D
-2
Verified step by step guidance1
Identify the species in question: a calcium ion represented as $\text{Ca}^{2+}$.
Recall that the superscript on an ion indicates its net charge, where the number shows the magnitude and the sign shows whether it is positive or negative.
For $\text{Ca}^{2+}$, the superscript '2+' means the ion has lost two electrons, resulting in a net positive charge of +2.
Understand that the net ionic charge is simply the charge indicated by the ion's notation, so no further calculation is needed.
Conclude that the net ionic charge of the calcium ion $\text{Ca}^{2+}$ is +2.
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