Rutherford’s alpha-particle scattering experiment was responsible for the discovery of
Proton
Electron
Atomic nucleus
Neutron
Compare the properties of electrons, protons and neutrons.
Explain with examples $(i)$ Atomic number, $(ii)$ Mass number. Give any two uses of isotopes.
Write the distribution of electrons in carbon and sodium atoms.
If an atom contains one electron and one proton, will it carry any charge or not ?
Find the valency of chlorine, sulphur and magnesium ?
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