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Millikan found the charge of an electron by his famous oil drop experiment.
J J Thomson determined the specific charge of the electron. That means the ratio of the charge of an electron to its mass.
With these two values one can find the mass of electron by dividing the charge value by its specific charge.
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Does electrons have the smallest mass?
not necessarily it has the smallest charge
Do protons have positive charge neutrons have negative charge and electrons have no charge?
No, protons have positive charge, electrons have negative charge and neutrons have no charge
What subatomic particle has a very small mass and a negative charge?
Electrons have a negative charge. When an element had more electrons than protons, it tends to have a negative charge.
Which electrons have the most energy in an atom?
All electrons in an atom have: * a negative one charge * 1/2 spin * 0.511 MeV of mass
What evidence convinced Thomson that cathode rays consist of negatively charged particles?
In a series of experiments in the 1890's, J.J.Thompson showed that cathode rays, or electrons, are deflected by an electric field, they are bent by a magnetic field, and that their charge to mass ratio is about 1/2000th of that of the proton. Light does not have any of these properties.
Who discovered that an electron has a mass that is very small compared to the size of the atom?
Since electrons were particles, it was obvious that they had some mass.Ever since electrons were discovered, there was curiosity to find the magnitude of their charge and mass. Millikan performed the famous oil-drop experiment and found out the charge of electrons .After that he equated it with the charge to mass ratio of electron and found out the mas of the electron.
Who determined the mass-to-charge of an electron?
J.J. Thompson discovered that cathode rays were made up of electrons, and determined the mass-to-charge ratio of the electrons. He found that the mass-to-charge ratio of the cathode rays was much smaller than that of hydrogen, and concluded that constituent particles (electrons) must be the building blocks of atoms. He modeled the neutral atom as a sphere of negatively charged electrons distributed amongst positively charged protons. This is known as the "plum pudding" model or the Thompson model of the electron.Ernest Rutherford proved that the Thompson model was incorrect when he discovered that gold atoms consist of an outside layer of electrons, with a center nucleus densely packed with protons.
What is charge to mass ratio of neutron?
The neutron has no charge, therefore the charge to mass ratio for the neutron is zero.
How you can derive mass to charge ratio equation?
It is a simple ratio charge/mass or e/m .
In the electron charge to mass experiment if the electron is replaced by a proton or neutron would the charge to mass ratio value still be the same why or why not?
Compared to the (charge/mass) ratio of the electron:-- The (charge/mass) ratio of the proton is much smaller; although the proton charge is equal to the electron charge, the proton mass is much larger, by a factor of more than 1,800.-- The (charge/mass) ratio of the neutron is zero, because the neutron charge is zero.
Why is the charge to mass ratio of proton not constant?
The charge and mass ratio of proton is constant, the positive particles found during discharge tube experiment are nuclei of atoms which have different charge and mass ratio.
Protons and electrons have this?
Protons and electrons have mass and charge.
What is an alternative method to measure the charge to mass ratio of an electron?
Modern Mass Spectrometry is the alternative method to measure the charge to mass ratio of an electron.
What charges do proton an electrons have?
Pprotons have a positive charge neutrons have no charge and electrons have a negative charge. However the one with the smallest mass is electrons.
Who calculated the mass of an electron?
J.J. Thompson discovered that cathode rays were made up of electrons, and determined the mass-to-charge ratio of the electrons. He found that the mass-to-charge ratio of the cathode rays was much smaller than that of hydrogen, and concluded that constituent particles (electrons) must be the building blocks of atoms. He modeled the neutral atom as a sphere of negatively charged electrons distributed amongst positively charged protons. This is known as the "plum pudding" model or the Thompson model of the electron.Ernest Rutherford proved that the Thompson model was incorrect when he discovered that gold atoms consist of an outside layer of electrons, with a center nucleus densely packed with protons.
Why did j.j reason the electrons must be a part of the atoms of all elements?
Cathode rays are negatively-charged particles.
What is the ratio of aluminum atoms to electrical atoms?
There is no such thing as an electrical atom? Aluminum is an element. Electrons are in every element. They carry a small mass and have an negative charge.
