railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Science Chemistry Structure of Atom

खालीलपैकी कोणत्या मूलद्रव्याची अणुसंख्या 11 आहे?

1
सिलिकॉन
2
जर्मेनियम
3
कार्बन
4
सोडियम
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