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Negatively charged particle with spin 1/2. A component of mundane terrestrial matter, and part of all neutral atoms and molecules. It has a mass about 1/1800 that of a proton. Its antiparticle is the positron.

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clarification on energy levels and exciting electrons

So I have two teachers, and both teachers keep telling me two different things and I don't know who to believe. 1st Teacher: Says that when an electron gets more than enough energy to shift to the fi …
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