The History of the Atom Timeline (2)
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1800, John Dalton- John Dalton developed the Atomic Theory in 1800. He still believed that the atom was the smallest unit of matter, and that it could not be broken down. He believed in Democritus' theory of the atom looking like a marble. John Dalton also tried to calculate the atomic weight of compounds. He also tried to come up with the atomic structures 1704, Isaac Newton- Isaac Newton: modelled the atom using billiard balls. 460BC, Democritus- Believed that if you continually cut a substance in half, eventually you would get an "uncut table" piece. He called these uncut table pieces particles, which means indivisible in Greek. He thought atoms were hard and small particles compiled by one substance and in one particular shape. He thought they were always moving and that 340BC, Aristotle- Aristotle didn’t think atoms could be constantly moving if they were in a void. He believed there were four elements and four qualities, and that they would align into their 1779, Antoine Lavoisier- Antoine Lavoisier found the two elements that make up water. He named one Oxygen (Greek for becoming sharp) because of the acid in it. He named the other Hydrogen (Greek for water former). His finding did not change the current atom model of his time, it just added 1869, Dmitri, Mendeleev- Dmitri Mendeleev produces the Periodic Table.
Transcript of The History of the Atom Timeline (2)
1800, John Dalton- John Dalton developed the Atomic Theory in 1800. He still believed that the atom was the smallest unit of matter, and that it could not be broken down. He believed in Democritus' theory of the atom looking like a marble. John Dalton also tried to calculate the atomic weight of compounds. He also tried to come up with the atomic structures of atoms.
1704, Isaac Newton- Isaac Newton: modelled the atom using billiard balls.
460BC, Democritus- Believed that if you continually cut a substance in half, eventually you would get an "uncut table" piece. He called these uncut table pieces particles, which means indivisible in Greek. He thought atoms were hard and small particles compiled by one substance and in one particular shape. He thought they were always moving and that they combined with each other.
340BC, Aristotle- Aristotle didn’t think atoms could be constantly moving if they were in a void. He believed there were four elements and four qualities, and that they would align into their rightful place and be at rest.
1779, Antoine Lavoisier- Antoine Lavoisier found the two elements that make up water. He named one Oxygen (Greek for becoming sharp) because of the acid in it. He named the other Hydrogen (Greek for water former). His finding did not change the current atom model of his time, it just added another element.
1869, Dmitri, Mendeleev- Dmitri Mendeleev produces the Periodic Table.
