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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6
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2
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1
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Detailed explanation-1: -For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen’s valence electrons as 2s²2p⁴.
Detailed explanation-2: -From the electronic configuration of the oxygen atom, we come to know that the number of electrons present in the outermost shell i.e., 2rd shell is 6 electrons. Thus, the total number of valence electrons present in an oxygen atom is six.
Detailed explanation-3: -It takes or accepts 2 electrons to achieve 8 electrons in its outermost shell to complete the octet and become stable. Hence the valency of oxygen is 2.
Detailed explanation-4: -The total number of electrons present in last shell orbit is known as valence electron. For example: Oxygen has 6 electrons present in last orbital shell hence 6 is valence electron.
Detailed explanation-5: -Oxygen, like all the other elements in group 16, has six valence electrons.