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Question
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
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Solution
- Electron
- Electrons are present outside the nucleus of an atom.
- Electrons are negatively charged that is (−1.6 × 10-19 coulomb).
- The mass of an electron is considered to be negligible. It is 1800 times less than that of a hydrogen
- The mass of an electron is 1800 times less than that of a hydrogen atom
- It revolves around the nucleus in the discrete orbit.
- Proton:
- Protons are present inside the nucleus of an atom.
- Protons are positively charged that is (1e = 1.6 × 10−19 coulomb).
- The mass of a proton is approximately 1 u (1 Dalton); that is, 1 u = 1.66 × 10−27 kg).
- When the total positive charge on the nucleus is expressed in the unit ‘e’, its magnitude is equal to the number of protons in the nucleus. The mass of one proton is approximately 1 u (1 Dalton).
- Neutron:
- Neutrons are present inside the nucleus of an atom.
- Neutrons are neutral. There is no charge.
- The mass of a neutron is nearly equal to the mass of a proton that is 1 u(1 Dalton) that is (1 u = 1.66 × 10−27 kg).
- The mass of a neutron is approximately lu, which is almost equal to that of a proton.
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