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He was the first scientist to question the ideas of atoms.
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He was an English chemist and he questioned about the structure of the atoms again. He knew that there was something about it but he couldn't discover anything.
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He tried to arrange the chemicals by their atomic weight and he then found that there were some unique ones that could not belong to any groups.
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After isolating various substances by successive chemical reactions and crystalizations of the products, the curies were able to discover polonium and radium. They then tested their ability to ionise the air.
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He discovered that the energy waves behave like discrete particals. He called this photons.
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He developed the theory that certain theories only occure in discrete amounts (Quanta).
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He identified the the positively charged matter in the nuclues and hence discovered protons.
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He discovered the existence of the electrons and introduced a model for the structure of the atom. He also found out that electrons are negatively charged.
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He discovered a new elementary particle.
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He called the Strong interaction of particles as 'string theory'.
