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प्रश्न
Select the correct answer from the answer in the bracket to complete the sentence.
An atom with electronic configuration 2, 7 and mass number 19 will have ________ neutrons.
पर्याय
8
10
12
MCQ
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उत्तर
An atom with electronic configuration 2, 7 and mass number 19 will have 10 neutrons.
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