Who introduced the first atomic theory in 1803-1808?
John Dalton
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10
Who proposed the Plum Pudding Model?
Thomson
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15
Explain the findings of JJ Thomson
He discovered the presence of electrons (negatively charged particles)
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15
Who proposed that: everything is composed of atoms that are indivisible, all elements are made up of different atoms with different masses, when atoms combine they form chemical compounds
John Dalton
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20
Draw the gold foil experiment and explain the findings/
Atoms are mostly empty space (that is why most of the atoms passed through) The atoms has a concentration of positive charge (that explains why some bounced)
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15
Explain the plum pudding model.
The plum pudding model is defined by electrons surrounded by a volume of positive charge, like negatively-charged plums embedded in a positively-charged pudding
