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Compare the properties of electron, proton and neutron.


If an atom contains one electron and one proton, will it carry any charge or not?

An electron is a negatively charged particle, whereas a proton is a positively charged particle. The magnitude of their charges is equal. Therefore, an atom containing one electron and one proton will not carry any charge. Thus, it will be a neutral atom. 


On the basis of Rutherford's model of an atom, which subatomic particle is present in the nucleus of an atom?

On the basis of Rutherford's model of an atom, protons (positively-charged particles) are present in the nucleus of an atom. 


What are canal rays?

The Canal rays are positively charged radiations consisting of particles which have a charge equal in magnitude but opposite in sign to that of the electron. The mass of a canal ray particle is 2000 times as that of the electron. This particle is known as proton.


On the basis of Thomson's model of an atom, explain how the atom is neutral as a whole. 

According to Thomson’s model of the atom, an atom consists of both negatively and positively charged particles. The negatively charged particles are embedded in the positively charged sphere. These negative and positive charges are equal in magnitude. Thus, by counterbalancing each other’s effect, they make an atom neutral.


Draw a sketch of Bohr's model of an atom with three shells.