Teaching KVS Junior Secretariat Assistant (LDC) Mock Test 2022 General Science Chemistry Structure of Atom

न्यूट्रॉनचा शोध कोणी लावला?

1
ई. गोल्डस्टीन
2
जे.जे. थॉमसन
3
जे. चॅडविक
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निल्स बोहर
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