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The qualities are divided up into seven intervals.
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It was an accident. I was found with radium.
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The electron is a negatively charged particle within the cloud of an atom.
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The proton was discovered by Ernest Rutherford. The word proton came from the Greek work "protos".
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The electrons are in a cloud surrounding the protons.
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The gold is mainly empty. While others pass right through, the gold did not.
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Small dense nucleus surrounding
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We will never know the speed or position of a particle perfectly.
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James Chadwick introduced the uncharged partical.