Structure of the Atom

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9 Terms

1
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John Dalton

  1. All matter made of tiny particles “atoms” which are indivisible and indestructible. Solid sphere

<ol start="1805"><li><p>All matter made of tiny particles “atoms” which are indivisible and indestructible. Solid sphere</p></li></ol><p></p>
2
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JJ Thomson

1904. Particles deflected by magnetic and electric fields which were small and negatively charged. Corpuscles - renamed electrons. Plum pudding model - atoms is a ball of positive charge with negatively charged ions within

<p>1904. Particles deflected by magnetic and electric fields which were small and negatively charged. Corpuscles - renamed electrons. Plum pudding model - atoms is a ball of positive charge with negatively charged ions within</p><p></p>
3
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Ernest Rutheford

  1. Gold foil experiment suggests that the atom has a small positive nucleus of protons with negative electrons moving around. atom was mostly empty. compact nucleus with negative charge surrounding.

<ol start="1911"><li><p>Gold foil experiment suggests that the atom has a small positive nucleus of protons with negative electrons moving around. atom was mostly empty. compact nucleus with negative charge surrounding.</p></li></ol><p></p>
4
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Niels Bohr

1913. Using Max Planck’s quantum theory to show that electrons orbit the nucleus. Chemistry of elements depend on number of electrons in outer most level.

<p>1913. Using Max Planck’s quantum theory to show that electrons orbit the nucleus. Chemistry of elements depend on number of electrons in outer most level.</p><p></p>
5
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James Chadwick

1932. Nucleus contains not 1 but 2 type of particles with identical mass. neutron - no charge. Protons and neutrons in the nucleus with electron orbits around.

<p>1932. Nucleus contains not 1 but 2 type of particles with identical mass. neutron - no charge. Protons and neutrons in the nucleus with electron orbits around.</p><p></p>
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proton

Rutherford

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Elecrton

Thomson

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Neutron

chadwick

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what is the trick to remeber the names and atoms

PEN = RTC