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#47 | |||
Fan Forum Legend
Joined: May 2017
Posts: 559,797
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Group - dynamics.
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#49 | |||
Fan Forum Legend
Joined: May 2017
Posts: 559,797
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Chemistry - atoms.
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#51 | |||
Fan Forum Legend
Joined: May 2017
Posts: 559,797
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Proton - affinity.
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