Karteikarten
chemistry
Karten in diesem Stapel (3)
- 1what is an electron?an electron is a 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
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- please revisit these every now and again because you keep forgetting these
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