Arrangement of Electrons
- Electrons are arranged in energy levels around the nucleus.
- The inner energy levels can take 2 electrons.
- The second/third electrons can take 8 electrons.
- This is called electronic configuration.
e.g. Argon (18 electrons)
Argon 2,8,8
- The number of electrons in the outer energy level correlates to an atom’s group in the periodic table.
e.g. Carbon 2,4 - Carbon in Group 4
