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- 1what is an electron?an electron is negatively charged subatomic particle
- 2what is mass number?mass number is the number of protons and neutrons in a nucleus
- 3shell representationthe different energy levels. The shell with the lowest energy is nearest to the nucleus.
- 4what is atomic number?atomic number is the number of protons each atom has in an element.
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- Fichas sobre Sin título, creado por fadelaja10957 el 22/08/2015.
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