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Atom
,→Properties of the Subatomic Particles
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|[[File:SubatomicParticleProperties.png|center|200px400px]]
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| style="height:20px; width:200px; text-align:center;" |A table showing the [[Relative Atomic Mass|relative mass]] and [[Relative Atomic Charge|relative charge]] of the [[proton]], [[neutron]] and [[electron]].
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===History of Atoms===
: The existence and structure of [[atom]]s was not always known.