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Lesson 3 of 7
Established science
Electrons
Negative charge, outside the nucleus
Electrons are much lighter. Charge −1. They occupy shells around the nucleus. In a teaching picture (the Bohr model) shell 1 holds 2, shell 2 holds 8.
- Protons
- 8
- Electrons
- 8
- Charge
- neutral
Electrons on oxygen
8
Neutral atoms have electrons = protons. Remove electrons and the atom is a positive ion. Add extras and it is negative. Bonds are made with these outer electrons.
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