engineering recuitment NPCIL Plant Operator Mock Test General Science Chemistry Structure of Atom

_________ वगळता सर्व अणूंच्या केंद्रकात न्यूट्रॉन असतात.

1
हायड्रोजन
2
कार्बन
3
ऑक्सिजन
4
नायट्रोजन
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