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Subjects
Science CBSE
Class 9
Structure of the atom
Textbook based HOTS
11.
Multiple Choice Question Answer XI
Exercise condition:
2
m.
1.
Number of valence electron in Ar are –
8
18
20
19
2.
Rutherford’s alpha – particle Scattering experiment was responsible for the discovery of -
Proton
Atomic nucleus
Neutron
Electron
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