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The electron was discovered by J.J. Thompson. Simply, he used a Cathode ray tube and magnetic fields to "bent" the flow of particles. He also determined the mass to charge ratio of the electron, thus proving it to be less massive (and a component) of the atom. By extension, as electrons were negative and matter is generally neutral, he knew that there must be something positive inside the atom to balance the charge. He came up with the plumb pudding model of the atom.
The proton was discovered by Ernest Rutherford. He bombarded a sheet of gold foil with alpha particles, and found that the majority of these particles passed through (thus disproving the plumb pudding model) while very few were radically deflected or reflected.
The neutron was discovered by James Chadwick. His experiment was a variation on that used by Irene Curie and her husband involving polonium and alpha radiation.
The discovery of each of the three basic particles that make up the atom is take up by three separate questions - one for each one. All there questions are listed in the related questions area below, and they are links to those questions.
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoThe British experimental physicist James Chadwickdiscovered the neutron in 1932. Of the three fundamental particles that make up atoms, the electron, the proton and the neutron, the neutron was the last to be discovered. The electron is a fundamental subatomic particle that was identified and assigned the negative charge in 1897 by Sir John Joseph Thomson and his team of British physicists. The proton was discovered in 1918 by Ernest Rutherford. ^^
Wiki User
∙ 10y agoThomson.
Discoverer of Proton and Neutron'The proton is discovered by Rutherford where as neutron is discover by chadwick.Add your answer:
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How can you figure out how many of each subatomic particle is in a atom has?
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Which part of Dalton's theory did Thomson's findings dispute?
The atom is the smallest known particle.
What did Rutherford's backward deflection of alpha particle give evidence of an atom's?
Rutherford, Geiger and Marsden discovered the atomic nucleus.
What is subatomic particle in an atom has a negative electrical change?
This particle from the atom is the electron.
What subatomic particle was first discovered?
This particle was the electron in 1897 (J.J. Thomson).
Which particle was discovered in the gold foil experiment?
The atom.
Who discovered the atom was not the smallest particle?
J. J. Thomson
What particle in an atom makes each elements unique?
in an atom protone makes the each element unique
Where is each subatomic particle located inside an atom?
it is located around an atom orbiting it
How can you figure out how many of each subatomic particle is in a atom has?
j
How can you find the number of each subatomic particle found in an atom of a particular element?
By looking at the atom.
What did John Thompson discover?
J.J Thomson discovered Electrons which is the negatively charged sub-atomic particle of an atom
What in an atom?
An atom is a particle, the smallest particle that can exist by itself.
The smallest particle of an element is called?
The smallest particle of an element is called an atom.
Which part of Dalton's theory did Thomson's findings dispute?
The atom is the smallest known particle.
What did Rutherford's backward deflection of alpha particle give evidence of an atom's?
Rutherford, Geiger and Marsden discovered the atomic nucleus.
How has the discoveries of particles through time helped progress understanding of the structure of an atom?
First atomic particle to be discovered was electrons. It is the electrons that participate in any chemical reactions. Second to be discovered was protons and indeed it made structure of atom clear that opposite charges attract each other and like charges repel. Some uncertainties about the radioactive properties of an atom was explained by the discovery of neutrons.
