Multiple Choice
Which of the following is the correct electron configuration for a fluoride ion (F-) in the ground state?
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10. Periodic Properties of the Elements
The Electron Configuration: Ions
Multiple Choice
How many total electrons are present in a Ni^{2+} ion?
A
26
B
30
C
28
D
26
Verified step by step guidance1
Identify the atomic number of nickel (Ni), which represents the number of protons and, in a neutral atom, also the number of electrons. For Ni, the atomic number is 28.
Understand that a Ni^{2+} ion has lost 2 electrons compared to the neutral atom because of the 2+ charge.
Calculate the number of electrons in Ni^{2+} by subtracting 2 from the atomic number: \$28 - 2$.
Recognize that the resulting number is the total number of electrons present in the Ni^{2+} ion.
Confirm that the total electrons in Ni^{2+} is 26, which matches the correct answer choice.
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