The arrangement of electrons in atoms
- Created by: RachelH
- Created on: 16-03-14 15:27
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- The arrangement of electrons in atoms
- Each electron in an atom is in an energy level
- Energy levels can be represented as shells, with electrons in the lowest energy level closest to the nucleus
- The lowest energy level or first shell can hold two electrons, and the second energy level can hold eight
- Electrons occupy the lowest possible energy levels
- The electronic structure of neon with 10 electrons is 2,8 and sodium with 11 electrons has the electronic structure 2,8,1
- Elements in the same group of the periodic table have the same number of electrons in their highest energy level, e.g. group 1 elements have one electron in their highest energy level
- Group 1 elements include lithium, sodium and potassium
- These elements react quickly with water and with oxygen
- The atoms of the unreactive noble gases (in group 0) all have very stable arrangements of electrons
- Each electron in an atom is in an energy level
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