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They were never invented.
They were discovered by various people at various times:
Ernest Rutherford effectively discovered protons, around 1910, with his famous gold film experiment. He is usually "officially" credited with the discovery for his work in 1919.
The electron was discovered in 1897 by J.J. Thomson.
The neutron was discovered in 1932 by James Chadwick.
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What is the mass of an electron compared to the mass of a proton or neutron?
Mass ratio proton (neutron)/electron: 1 836
How many particles do the atom have?
5, electron, proton, neutron, nucleus, and electron cloud.
Which particle will have the same mass proton and electron proton and neutron electron and neutron or all three particles?
The masses of all three particles are different The masses of a proton and the mass of a neutron are very close, however. The mass of an electron is much smaller than the mass of a proton or neutron.
What have a neutral charge proton neutron electron plasma?
neutron
What is the electric charge of a proton a neutron and a electron?
Protons : Positive unit chargeElectrons: Negative unit chargeNeutrons: No charge.
What are three subatomic paarticles in an atom?
Neutron, proton, electron.Neutron, proton, electron.Neutron, proton, electron.Neutron, proton, electron.
Does an electron have more maas than a proton or neutron?
an electron is much lighter than a proton or neutron.
How does the mass of a electron compare to the mass of a proton and neutron?
Mass ratio proton (neutron)/electron: 1 836
How does the mass of a proton compare to the mass of a neutron and an electron?
Mass ratio proton (neutron)/electron: 1 836
What is the mass of an electron compared to the mass of a proton or neutron?
Mass ratio proton (neutron)/electron: 1 836
If a proton had a mass of 1 what is the mass of an electron and neutron relative to the mass of the proton?
If a proton would be 1, an electron would be 0.000544. An electron is 1,836 times lighter than a proton. A neutron would be 1.001 as a proton is 99.86% the mass of a neutron
What subatomic particles are closest in mass proton and neutron neutron and electron proton and electron electron and ion?
Mg+2 and Br-1
What is the size of electron proton and neutron?
The electron is the smallest having about 1/1836th the mass of a proton or neutron, which means that basically an electron has no mass. The neutron and proton weigh the same both having a mass of 1.
How many particles do the atom have?
5, electron, proton, neutron, nucleus, and electron cloud.
Which charge contributes to the proton electron and neutrion?
The three principal particles of an atom are the proton, electron and neutron. The proton and electron have +1 and -1 charges respectively. The neutron does not have a charge.
Is an example of an electrostatic force acting in an atom neutron attracting an electron a proton attracting an electron an electron attracting another electron a neutron attracting a proton?
This is valid only for the attraction between a proton and an electron.
Which particle will have the same mass proton and electron proton and neutron electron and neutron or all three particles?
The masses of all three particles are different The masses of a proton and the mass of a neutron are very close, however. The mass of an electron is much smaller than the mass of a proton or neutron.
