Draw a sketch of Bohr’s model of an atom with three shells.
Helium atom has an atomic mass of $4\,u $ and two protons in its nucleus. How many neutrons does it have ?
If an atom contains one electron and one proton, will it carry any charge or not ?
What are canal rays ?
Compare all the proposed models of an atom given in this chapter.
On the basis of Rutherford’s model of an atom, which subatomic particle is present in the nucleus of an atom ?
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