The Atom: A Look at the Size and Composition of Atoms

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Chemistry Lesson 2.1
Relative sizes of ordinary things, cells, atoms, and subatomic particles
How small is an atom?
How small is a proton?
What are atoms made of?

Check out the Build an Atom Simulation by PhET:
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I can't find numerical problem solved questions on the topic electron, neutron and proton on your YouTube channel. Please help me to find.

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