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Atoms and Radioactivity › View

Which particles make up the nucleus of an atom?
A. protons and neutrons
B. electrons and protons
C. electrons, protons, and neutrons
D. electrons and neutrons

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Alzheimer Disease › View

How many Americans suffer from Alzheimer’s?

A. 4.5+ million

B. 3.5+ million

C. 5.5+ million

D. 2.5+ million

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