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The nucleus of an atom is far too small to be "seen" in any conventional sense. The structure of the atom, that is, the one with most of the mass of the atom concentrated in the center, or nucleus, was developed by physicist Ernest Rutherford. In a sense, he is the one who first "saw" the nucleus of the atom. A link to the Wikipedia article on the atom, an article which includes the history of discoveries that lead to modern concepts of it, is provided. A link is also provided to the Rutherford model of the atom, also at Wikipedia. Hey, the nice folks at Wikipedia post knowledge for free. Why not surf on over and help yourself? It's a buffet, with all you can eat.
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∙ 15y ago
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∙ 6y agoErnest Rutherford (1871-1937) discovered and named the nucleus. Between 1908 and 1913, his assistants Hans Geiger and Ernest Marsden carried out experiments with alpha particles and gold foil. From the results, Rutherford concluded that all of the positive charge (and practically all of the mass) of the atom is concentrated in a tiny fraction of the total volume of the atom. He called it the nucleus (from the Latin for little nut).
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Ernest Rutherford discovered that the atom had a nuclius.
He was performing an experiment using thin gold leaf (roughly one atom thick) and a source of alpha particles. He used an alpha particle detector to find where they were scattered to by the gold atoms. The then current Thomson "plum pudding" model of the atom predicted the alpha particles would all be scattered through small angles in the forward direction. Rutherford confirmed that the vast majority of the alpha particles were scattered exactly as predicted by that theory. However being a very careful scientist Rutherford tested all angles, including ones where the "plum pudding" model said it was impossible to find scattered alpha particles. Almost all showed no alpha particles as expected, but then he detected a small but very significant number of alpha particles scattering almost directly back to the source that they came from. This was entirely impossible in the "plum pudding" model, and suggested that the atom contained a very tiny hard core containing all the positive charge of the atom, this hard core came to be called the nuclius.
His observations in this experiment would be analogous to a macroscopic experiment where you fired artillery shells at a sheet of paper and while most of the shells passed through the paper occasionally one would bounce right back off the paper and hit the artillery piece it was fired from!
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∙ 14y agoErnest Rutherford, a physicist from New Zealand who was born Aug. 30, 1871, discovered the atomic nucleus.
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∙ 12y agojake willis in 1703 made the discovery that would change the world.
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∙ 12y agoin what year was the nucleus identified?
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∙ 12y agoErnest Rutherford.
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∙ 12y agoZealander Ernest Rutherford.
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∙ 13y agoErnest Rutherford
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What is the center of an atom called?
The center of an atom is called a nucleus (nucleifor plural).Center of an atom is called the "Nucleus".
What is the dense center of the atom called?
the denser part of an atom is the nucleus. about 99% of the mass of an atom is concentrated within the atom.
Where can you find neutrons in an atom?
Nuetrons are found in the center of an atom which is called the nucleus.
Where is the protons located on an atom?
The proton is located in the atom's nucleus, with the neutrons (if there are any).
What are helium atom nucleus?
The nucleus of a helium atom is composed of two protons and two neutrons. Alpha particles have the same composition as the nucleus of a helium atom.
How are atoms identified?
Atoms are normally identified according to the element of which that atom is an example. And that, in turn, is determined by the number of protons in the atom's nucleus. So, any atom that has just one proton is a hydrogen atom. If it has two protons it is a helium atom. And so forth.
What is the particle that identifies a atom?
The number of protons in an atom's nucleus determines its chemical identity.
Who is series of experiments identified the nucleus of an atom?
The gold-foil experiment
What did Sir ernest Rutherford do?
He identified the alpha particle as a helium atom and used it in postulating the existence of the atomic nucleus.
What is the center of an atom called?
The center of an atom is called a nucleus (nucleifor plural).Center of an atom is called the "Nucleus".
What is the dense center of the atom called?
the denser part of an atom is the nucleus. about 99% of the mass of an atom is concentrated within the atom.
What can all elements be identified by?
Their atomic number, which represent the number of protons in the nucleus. This will also be the number of electrons in the unionised state of the atom.
What is used identify an atom?
Atoms are normally identified according to the element of which that atom is an example. And that, in turn, is determined by the number of protons in the atom's nucleus. So, any atom that has just one proton is a hydrogen atom. If it has two protons it is a helium atom. And so forth.
What used to identify an atom?
Atoms are normally identified according to the element of which that atom is an example. And that, in turn, is determined by the number of protons in the atom's nucleus. So, any atom that has just one proton is a hydrogen atom. If it has two protons it is a helium atom. And so forth.
What part of an atom forms a nucleus?
The nucleus forms the centre of the atom. The protons and neutrons are found in the nucleus of the atom.
Center of atom?
The center of an atom is the atomic nucleus.
Most of the mass of an atom is concentrated in the?
in the nucleus of the atom
