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2
|
James chadwick
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3
|
Number of protons and neutrons
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4
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Any substance made up of same kind of atoms
|
5
|
Discovered anode rays
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6
|
Neutrons carry
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7
|
Number of protons present in the nucleus
|
8
|
He concluded that Cathode rays are negatively charged and named them electrons
|
9
|
Elements with same atomic number but different mass number
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|
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|
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1
|
Atomic theory
|
2
|
Mass number minus atomic number
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|
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