differences between electron proton and neutrons who discovered these and give example
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Electron:
Johann Wilhelm Hittorf in 1869 got the first observations of cathode rays. and in 1876, Eugen Goldstein showed that the rays from this glow cast a shadow. He called them Cathode Rays.
In 1896 J. J. Thomson, with his colleagues John S. Townsend and H. A. Wilson, performed experiments that showed that cathode rays were actually unique particles.
Rutherford and Bequerel later showed that radioactive materials emitted negative particles (called beta particles) which were found to be electrons.
The charge of the electron was determined by Robert Millikan and Harvey Fletcher in 1909 using the so-called Oil Drop Experiment.
Proton:
Rutherford first showed that atoms had massive nuclei by scattering electrons against gold foil. Later, in 1917 Rutherford proved that the hydrogen nucleus is present in other nuclei. This was basically the discovery of the proton. It was also show that ionized hydrogen had a positive charge.
Neutron:
After the discovery of atomic nuclei and the proton, Rutherford further investigated the composition of atomic Nuclei observing that they could not be made only from hydrogen nuclei (ie protons). He suggested in 1911 that the nucleus was made of positive and neutral particles and dubbed the latter ones neutrons. In the 1920’s and 1930’s it was however determined that indeed tha neutron was a separate particle. Later a colleague of Rutherford, James Chadwick, determined the mass of the neutron. Later Fermi, in 1934, managed to produce slow Neutrons from nuclear reactions
Johann Wilhelm Hittorf in 1869 got the first observations of cathode rays. and in 1876, Eugen Goldstein showed that the rays from this glow cast a shadow. He called them Cathode Rays.
In 1896 J. J. Thomson, with his colleagues John S. Townsend and H. A. Wilson, performed experiments that showed that cathode rays were actually unique particles.
Rutherford and Bequerel later showed that radioactive materials emitted negative particles (called beta particles) which were found to be electrons.
The charge of the electron was determined by Robert Millikan and Harvey Fletcher in 1909 using the so-called Oil Drop Experiment.
Proton:
Rutherford first showed that atoms had massive nuclei by scattering electrons against gold foil. Later, in 1917 Rutherford proved that the hydrogen nucleus is present in other nuclei. This was basically the discovery of the proton. It was also show that ionized hydrogen had a positive charge.
Neutron:
After the discovery of atomic nuclei and the proton, Rutherford further investigated the composition of atomic Nuclei observing that they could not be made only from hydrogen nuclei (ie protons). He suggested in 1911 that the nucleus was made of positive and neutral particles and dubbed the latter ones neutrons. In the 1920’s and 1930’s it was however determined that indeed tha neutron was a separate particle. Later a colleague of Rutherford, James Chadwick, determined the mass of the neutron. Later Fermi, in 1934, managed to produce slow Neutrons from nuclear reactions
ishitaaggarwal43:
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*. Electron are negatively charged particle.
They are revolving around the atoms .
The number of electrons is equal to number of protons.
*. Protons are positively charged particles .
They are present in nucleus of an atom.
The number of protons = atomic number of that element.
*. Neutrons have No charge they are neutral.
The combination of protons and neutrons in nucleus is what we call as mass number.
hope it helps u
They are revolving around the atoms .
The number of electrons is equal to number of protons.
*. Protons are positively charged particles .
They are present in nucleus of an atom.
The number of protons = atomic number of that element.
*. Neutrons have No charge they are neutral.
The combination of protons and neutrons in nucleus is what we call as mass number.
hope it helps u
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