SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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5
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6
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7
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8
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Detailed explanation-1: -The number of outer orbital electrons is represented by the group number of an element. Oxygen belongs to VIA and hence its outer most shell has 6 valence electrons.
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: -So, electronic configuration of oxygen is 2, 6. 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.