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प्रश्न
Which one of the following is a correct electronic configuration of sodium?
पर्याय
2, 8
8, 2, 1
2, 1, 8
2, 8, 1
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उत्तर
2, 8, 1
Explanation:
The atomic number of sodium (Na) = 11
Its electronic configuration = 2, 8, 1
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