atomic structure

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Hello, I am Democritus and I propose that all matter is composed of tiny and hard particles called "atoms".
At about 400 B.C Democritus proposed that matter is composed of tiny and hard particles called atomos which are now called atoms.
The four parts of my theory were all matter is made of atoms that are invisible, all atoms of a given element are identical in mass and properties, compounds are a combination of two or more and lastly a chemical reaction is a rearrangement of atoms.
In the year 1808 John Dalton created the first atomic theory. He also found the atomic mass with other chemists and biochemists.
On 1869 Dmitri Mendeleev created the periodic table with the Mendeleev theory. Mendeleev theory was arranging 63 elements based on atomic mass into a periodic table.
I created the periodic table with mendeleev theory along with it I created 60 elements for it.
In the year 1910, Ernest Rutherford, the nucleus and the protons inside the nucleus through the gold foil experiment. In 1911 he also proved Plum Pudding wrong.
The neutrons are found inside the nucleus and are uncharged, thus giving them their name.
In 1932, James chadwick discovered the neutrons found indside nucleus

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