GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2
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8
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18
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32
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Detailed explanation-1: -The first principal energy level contains only an s sublevel; therefore, it can hold a maximum of two electrons. Each principal energy level above the first contains one s orbital and three p orbitals. A set of three p orbitals, called the p sublevel, can hold a maximum of six electrons.
Detailed explanation-2: -For example, energy level I can hold a maximum of two electrons, and energy level II can hold a maximum of eight electrons.
Detailed explanation-3: -The maximum number of electrons in the n=2 energy level is eight. This is because the s sublevel only has one orbital while the p sublevel only has three orbitals. Each orbital contains a maximum of two electrons, each with an opposite spin to the other.
Detailed explanation-4: -Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.