Which of the following statements about the electron is incorrect?
(i) It is a negatively charged particle.
(ii) The mass of electron is equal to the mass of neutron.
(iii) It is a basic constituent of all atoms.
(iv) It is a constituent of cathode rays
Answers
Concept: A subatomic particle with a negative charge is called an electron. It can either be free (not attached to any atoms) or bonded to an atom's nucleus. Atomic electrons are organised into spherical shells with different radii to represent different energy levels. The energy held within an electron increases with the size of the spherical shell.
The migration of electrons from one atom to the next and generally from the negative to the positive electric poles causes current flow in electrical conductors. Current also manifests itself as an electron movement in semiconductor materials. But in some instances, picturing the current as a flow of electron deficits from atom to atom is more instructive. A hole is an atom in a semiconductor that lacks electrons. In general, holes "migrate" from the positive to the negative electric poles.
The unit electrical charge is thought to be the charge on a single electron. It has been given a negative polarity. The positive charge on a proton or hole is opposite to the charge on an electron, which is equal to it. Due to the exceedingly little charge that an electron carries, electrical charge quantity is typically not expressed in terms of this charge. The coulomb, represented by the letter C and equal to approximately 6.24 x 1018 electrons, is the preferred method of measuring electrical charge quantities. The electron charge, denoted by the letter e, is roughly 1.60 x 10-19 C. I represented the mass of an electron at rest as 9.11 x 10-31 kilogramme (kg).
Given: MCQ based on electron
To find: the incorrect statement about electron
Solution:
As per the concept given above, we can conclude that
- electron is a negatively charged particle
- the mass of electron is equal to the mass of the proton
- it is a basic constituent of all atoms
- it is a constituent of cathode rays
Hence, the incorrect statement about the electron is option (ii) the mass of electron is equal to the mass of neutron.
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