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Question
Which of the following element has a total of two shells, with three electrons in its valence shell?
Which of the following element has a total of two shells, with three electrons in its valence shell?
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Solution
The correct option is B Boron
From the given information,
electronic configuration of the element is 2,3. So, the atomic number is five.
Therefore, boron is the element which has a total of two shells, with three electrons in its valence shell and with atomic number five.
Whereas, lithium has total 2 shells, with one electron in its valence shell.
Phosphorus has total 3 shells, with five electrons in its valence shell.
Oxygen has total 2 shells, with six electrons in its valence shell.
From the given information,
electronic configuration of the element is 2,3. So, the atomic number is five.
Therefore, boron is the element which has a total of two shells, with three electrons in its valence shell and with atomic number five.
Whereas, lithium has total 2 shells, with one electron in its valence shell.
Phosphorus has total 3 shells, with five electrons in its valence shell.
Oxygen has total 2 shells, with six electrons in its valence shell.
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