Physics
Name the three constituents of an atom and state mass and charge of each. How are they distributed in an atom?
Radioactivity
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Answer
The three constituents of an atom are electrons, protons and neutrons.
The mass of an electron is 9.1 × 10-31 kg and charge is -1.6 × 10-19 C.
The mass of a proton is 1.67 × 10-27 kg and charge is +1.6 × 10-19 C.
The mass of a neutron is 1.67 × 10-27 kg and charge is zero.
The protons and neutrons reside inside the nucleus of the atom which is at it's centre, while the electrons revolve around the nucleus in some specific orbits.
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