Sia
Question
Biology
Posted 9 months ago
An atom gains one electron to become an ion. Which of the following is most likely true?
A. It contained two electrons in its outer shell
B. It contained 7 electrons in its outer shell
C. It is participating in a covalent bond
D. It contained 4 electrons in its outer shell
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Answer from Sia
Posted 9 months ago
B
Key Concept
Electron Configuration
Explanation
An atom that gains one electron to become an ion is most likely to have had 7 electrons in its outer shell, making it more stable by achieving a full octet.
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