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The top documents tagged [mass protons]
Advanced Placement Biology Mr. Jim Sullivan Boston University
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Lesson 13
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Atomic Structure
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1. The ancient Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided? a) Element b) Electron c) Atom d) Molecule
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Isotopes All atoms of an element have the same number of protons. However, they can have a different number of neutrons. What do we call an atom when they
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Physical Science Chapter 4. Atoms The atom is a basic unit of matter that consists of a dense central nucleus surrounded by a cloud of negatively charged
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electrostatics.pdf
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