Multiple Choice
How many electrons are present in an Al^{3+} ion?
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Table of contents
- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
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- Main Group Elements: Bonding Types4m
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- 24. Transition Metals and Coordination Compounds3h 16m
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- Complex Ions5m
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- Intro to Crystal Field Theory10m
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- Crystal Field Theory Summary8m
- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
2. Atoms & Elements
Ions
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many electrons are present in an oxide ion (O^{2-})?
A
8
B
10
C
6
D
12
Verified step by step guidance1
Identify the atomic number of oxygen, which tells you the number of protons and, in a neutral atom, the number of electrons. For oxygen, the atomic number is 8.
Understand that the oxide ion (O^{2-}) has gained 2 extra electrons compared to the neutral oxygen atom.
Calculate the total number of electrons in the oxide ion by adding the 2 extra electrons to the 8 electrons of the neutral oxygen atom.
Write the expression for the total electrons: $8 + 2 = 10$ electrons.
Conclude that the oxide ion (O^{2-}) contains 10 electrons.
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