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Oduvanchick [21]
3 years ago
10

Please help me! Just with these few, and I will mark brainliet!

Biology
1 answer:
Drupady [299]3 years ago
4 0

1. Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level

2.protons, neutrons, and electrons have a mass, but electrons have far less mass

3.cations and protons

4. idk

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