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John Dalton's Birth :)
John Dalton was born on September 6, 1766 at Eaglesfield, near Cockermouth in Cumberland. -
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John Dalton and the Theory of the Atom
John Dalton is the man who discovered the atom in the 1800s. -
John Dalton and his Brother
In 1781 John Dalton moved to Kendal, where he conducted a school with his cousin and his elder brother. -
John Dalton and his Occupations
John Dalton was a scientist and weather pioneer and became the one who established the modern concept of atoms known as Dalton's Atomic Theory. -
John Dalton and his Disabilities
John Dalton was a humble man with several apparent handicaps: he was poor, he was not articulate, he was not a skilled experimentalist, and he was color blind. These
disadvantages are a terrible problem for a chemist, but in spite of these John made his most important contribution to science called the atomic theory. -
The Theory of the Atom
The atom is a sphere full of an electrically positive substance mixed with a negative electron.
An atom a fundamental piece of matter. -
John Dalton's Atomic Theory
John Dalton's atomic theory rests on the following:
1.All matter consists of tiny particles
2.Atoms are indestructible and unchangeable
3.Elements are characterized by the mass of there atoms
4.When Elements react, their atoms combine in simple, whole-number ratios -
John Dalton's Death :(
John Dalton died on July 17, 1844 when he was 78. He died of a stroke because he was old and weak at the time. -
Parts of the Atom (Electron)
In 1897, Joseph John Thompson discovered the first component part of the atom: the electron, a particle with a negative electric charge. -
Parts of the Atom (Protons)
In 1911, Ernest Rutherford discovered the proton, a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron. -
Parts of the Atom (Neutrons)
In 1932, James Chadwick discovered the neutron, a subatomic particle of about the same mass as a proton but without an electric charge
