GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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8
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3
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5
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2
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Detailed explanation-1: -The first shell (closest to the nucleus) can hold two electrons. The second shell can hold 8 electrons. The third shell can hold 32 electrons. Within the shells, electrons are further grouped into subshells of four different types, identified as s, p, d, and f in order of increasing energy.
Detailed explanation-2: -(a) The innermost shell of an atom can accommodate 2 electrons.
Detailed explanation-3: -We should start with the atoms that have atomic numbers between 1 and 18. There is a 2-8-8 rule for these elements. The first shell is filled with 2 electrons, the second is filled with 8 electrons, and the third is filled with 8. You can see that sodium (Na) and magnesium (Mg) have a couple of extra electrons.
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.
Detailed explanation-5: -Answer and Explanation: The innermost electron shell is the 1s orbital. It is the first shell that is filled by any element as it is the lowest energy level. All s orbitals can hold a maximum of 2 electrons.