Subjects
Science CBSE Homework Assignments
Class 9
Structure of the atom
Subatomic particles

1. Discovery of subatomic particles

Question:

3 m.

1. The discovery of the proton is made by

Eugen Goldstein
J. J. Thomson
Niels Bohr
James Chadwick

2. All atoms have neutrons, except for

helium
hydrogen
lithium
None of these

3. Neutron has the charge of

\(+2\)
\(+1\)
\(-1\)
\(0\)

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