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Electron was the first subparticle discovered because it has a negative charge .later protons where discovered because using the foil method determined the protons existence .But because the neutrons are neutral and uncharged they where the last to be dicovered even though they take up almost all the mass of an atom
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∙ 12y ago
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∙ 10y agoDemocritus(about 400 B.C.) coined the term "atom"-- the smallest particle of matter
Sir Ernest Rutherford bombarded 1000 alpha(positive) rays on a gold foil of 0.0004mm.He observed that only one ray reflected back and most of them passed straightly and also some of them deflected slightly.From this, he concluded that atom contains something with positive charge at its center and that is the nucleus. He also concluded that atom was mostly hollow and that the nucleus is the main reason for the weight of an atom.
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∙ 11y agoEDIT: JJ Thompson, Ernest Rutherford's supervisor, discovered the electron first in 1897. Later, 1911, Rutherford postulated the nucleus model of the atom, replacing the 'plum-pudding' model of JJ Thomson.
First it was discovered by Ernest Rutherford that atoms had an area of condensed positive charge in the centre, which he called the nucleus. Then the particles that made up the nucleus were identified as protons, and then the smaller charges around the nucleus were found and called electrons. Then to explain the mass of the nucleus the existence of the neutron was hypothesised and confirmed.
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∙ 13y agoDiscovery of electron: J. J. Thompson, J. S. Townsend, H. A. Wilson - 1897
Discovery of proton: E. Rutherford - 1919
Discovery of neutron: J. Chadwick - 1932
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∙ 12y agoProton was discovered by Sir Ernest Rutherford.
Neutron was discovered by James Chadwick.
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∙ 11y agoIn 1917 Earnest Rutherford discovered of the proton.
In 1932 James Chadwick experimentally discovered the neutron to solve some weight inconsistencies.
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∙ 11y agoElectron: J.J. Thomson, J.S. Townsend, H. A. Wilson, 1896
Proton: Ernest Rutherford, 1920
Neutron: James Chadwick, 1932
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∙ 15y agoelectron was discovered first
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∙ 12y agoelectrons
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What are the subparticles of an atom?
proton, neutron, electron- in the nucleus
When a neutron decays what does it form?
Outside the nucleus, free neutrons are unstable and have a mean lifetime of 885.7±0.8 s (about 15 minutes), decaying by emission of a negative electron and antineutrino to become a proton: : n0 → p+ + e− + νe
What is the positivley charged particle in the nucleus of and atom?
The proton is positive, the neutron is neutral and the electron is negative.
Who is discovered the nucleus and its subatomic particles?
Electron: J. J. Thomson, 1897 Proton: Ernest Rutherford, 1919 Neutron: James Chadwick, 1932
How are an atoms nucleus and its electron cloud different?
An atoms nucleus contains the proton and neutron while the electron cloud contains its electrons
How many particles do the atom have?
5, electron, proton, neutron, nucleus, and electron cloud.
What is the lightest proton neutron electron or nucleus?
Electron is the lightest.
What subatomic particles is neutral nucleus proton neutron electron?
neutron
What particle is not located in the nucleus proton electron neutron quark?
The electron.
What are the subparticles of an atom?
proton, neutron, electron- in the nucleus
What heappens to an atom that experiences radioactive decay?
Electron capture is the absorption of an electron by an atomic nucleus if that nucleus is neutron poor. An electron is captured, usually from an inner electron shell of that atom, and it will convert a proton in the nucleus into a neutron. We know that a neutron is converted into a proton and an electron in neutron decay, so it might be looked at as something of an opposite nuclear reaction where a proton and an electron combine to form a neutron.
What is an atom name that is made of a proton a neutron and an electron?
It is the atom of deuterium. Its nucleus is composed of a proton and one neutron. The atom has one electron that is orbiting around the nucleus.
What is a proton in the nucleus converted into what during electron capture?
During electron capture, an electron and proton combine and are converted to a neutron.
What is the difference between the three subatomic particles?
The main differences are proton and neutron are in the nucleus, electrons are outside of the nucleus. The weight of an electron is between a hundred and a thousand times less of that of a proton and neutron and the charge on a proton is positive, neutron is neutral and electron is negative
who particle has greatest mass electron proton neutron or hydrogen nucleus?
hydrgen nucleus
What is the organization of atoms?
It is proton neutron in the nucleus and then electrons in the electron cloud.
What is the organization of an atom?
It is proton neutron in the nucleus and then electrons in the electron cloud.
