Multiple Choice
Which of the following ions is isoelectronic with Ar?
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- 1. Intro to General Chemistry3h 48m
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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 must a sulfur atom gain to achieve an octet in its valence shell?
A
2
B
1
C
6
D
4
Verified step by step guidance1
Identify the number of valence electrons in a sulfur atom. Sulfur is in group 16 of the periodic table, so it has 6 valence electrons.
Recall that the octet rule states atoms tend to have 8 electrons in their valence shell to achieve stability.
Calculate how many electrons sulfur needs to gain to reach 8 valence electrons by subtracting its current valence electrons from 8: $8 - 6$.
Determine that sulfur must gain 2 electrons to complete its octet.
Understand that gaining 2 electrons allows sulfur to achieve a full valence shell, making it more stable.
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