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Structure of Atoms

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
show smallest particle of an element that maintains the properties of that element  
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show average mass of one atom of an element (from particles in the nucleus)  
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Atomic Number   show
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show a characteristic of a substance that describes how it combines with other substances to form new ones  
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Electrical Charge   show
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Electron   show
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show the negatively charged space containing electrons that surrounds the atomic nucleus  
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Element   show
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show the vertical columns on the Periodic Table  
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Neutron   show
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show the positively charged center of an atom containing the protons and neutrons  
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show a conceptual model in which the elements are organized according to their properties; often displayed as a chart  
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Periods   show
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show property of matter that can be observed without changing the composition or identity of the matter  
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Proton   show
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show a particle smaller than an atom, such as a proton, neutron, or electron  
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show electron(s) located in outer energy level (electron shell)  
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