Atomic structure and the Periodic Table
- Created by: Andrew
- Created on: 01-02-19 16:27
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Atomic structure and the periodic table
Atomic structure:
The atom is made of three subatomic particles:
- Protons - Charge of +1, relative mass of 1
- Neutrons - Charge of 0, relative mass of 1
- Electrons - Charge of -1, relative mass is negligible or 0
The nucleus: Protons and neutrons are found in the nucleus, they give the mass and atomic numbers
Electron shells: Electrons orbit the nucleus at set distances in shells, each can hold a certain number of electrons
- 1st shell: 2
- 2nd shell: 8
- 3rd shell: 8
- 4th shell: 2
The numbers of protons and electrons are equal in atoms, so the charges cancel out and the atom is…
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