GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many total electrons does O-2 (an oxide ion) have?
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8
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10
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6
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18
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Explanation:
Detailed explanation-1: -In O2-ion, there will be 10 electrons, as it has gained two electrons. The electronic configuration is 2, 8. Therefore, the number of valence electrons in O2-is 8.
Detailed explanation-2: -Based on the above discussion, it is concluded that the O²⁻ ion has 8 protons and 10 electrons.
Detailed explanation-3: -The ion has the same number of protons because you never lose a proton to make an ion. But in the case of oxide form, it carries two negative charges. Negative charge come due to the transfer of electron. Therefore the number of electrons is 10.
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