객관식
Which of the following elements is most likely to form stable molecules in which the central atom has an incomplete octet?
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11. Bonding & Molecular Structure
Octet Rule
객관식
According to the octet rule, what is oxygen most likely to do in order to complete its outermost electron shell?
A
Lose 2 electrons
B
Gain 4 electrons
C
Gain 2 electrons
D
Share 4 electrons
검증된 단계별 안내1
Recall that the octet rule states atoms tend to gain, lose, or share electrons to have 8 electrons in their outermost shell, achieving a stable electron configuration similar to noble gases.
Determine the number of valence electrons oxygen has. Oxygen is in group 16 of the periodic table, so it has 6 valence electrons.
Calculate how many electrons oxygen needs to reach a full octet (8 electrons). Since oxygen has 6 valence electrons, it needs 2 more electrons to complete its outer shell.
Consider the options: losing 2 electrons would leave oxygen with only 4 valence electrons, which is less stable; gaining 4 electrons is more than needed; sharing 4 electrons means forming two bonds, which is possible but the question focuses on completing the octet by electron count.
Conclude that oxygen is most likely to gain 2 electrons to complete its octet, as this satisfies the octet rule by filling its outermost shell to 8 electrons.
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