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

ન્યુટ્રોનની શોધ કોણે કરી?

1
ઇ. ગોલ્ડસ્ટેઇન
2
જેજે થોમસન
3
જે. ચેડવિક
4
નીલ્સ બોહર
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