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1
IIT-JEE 1981
MCQ (Single Correct Answer)
+1
-0.25
Rutherford's experiment on scattering of $$\alpha-particles$$ showed for the first time that the atom has
2
IIT-JEE 1979
MCQ (Single Correct Answer)
+1
-0.25
The number of neutrons in dipositive zinc ion with mass number 70 is
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