railway RRB ALP (CBT 1 + CBT 2 + CBAT) Mock Test Series 2025 (New) General Science Chemistry Classification of Elements and Periodicity in Properties

k कवचामध्ये जास्तीत जास्त किती इलेक्ट्रॉन सामावून घेता येतील?

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18
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32
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8
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