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Chemistry CBSE Live product
Class 9 (2025-26)
Structure of the atom
Annual Revision V - Structure of the atom
1.
Discovery of canal rays
Question:
3
m.
Choose the correct answer:
1
.
The study of canal rays by Goldstein helped in the discovery of which subatomic particle?
Neutrons
Photons
Electrons
Protons
2
.
Which subatomic particle has a charge of -1 and negligible mass?
Positron
Proton
Electron
Neutron
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