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Discovered that lightning was made of electricity
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Presented the ideas that became the foundation for atomic theory. Thise being:
All matter consists of indivisabe atoms.
Atoms of a perticular element are identical in weight and have identical properties.
Atoms if each element have a unique weight.
Atoms are neither created or destroyed in reactions.
Compounds are formed from the combination of atoms of 2 or more elements
The proportion and kind of atom is fixed in a given compound
Atoms combine in simple numerical ratios -
Invented the Crookes tube, which was later used in the discovery of electrons.
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Discovered X-rays, A type of radiation that originated from the atom and carried no charge.
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Discovered radioactivity
Deduced that pitchblend was radioactive -
Discovered that the atom could be split.
Discoered the electron.
Worked with the Cathode ray tube to discover that electrons were negativly charged.
Created the Plum Pudding model. -
Disproved Plup pudding model
Discovered the proton
Discovered that atoms had a nucleus where most of the the mass was concentrated
Created the planitary model in 1911 -
Suggested that electrons were aranged in 'shells' around the nucleus . He suggested that electrons could become excited by electricity, heat and light, causing them to 'jump' to the next electron shell, and when they return they will emit a small quantum of energy
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Discovered the neutron by obserfing a particle in a cloud chamber which was not deflected by a magnetic field.