Atomic Structure

Atomic Structure

1. Shells

   • The first shell can only have 2 electrons. Then after that the max each shell can have is 8.
   • Completed outer shells mean it is a noble gas. Therefore it is not reactive.
     • As it has 8 electrons to create a whole shell. Which means it is really stable
   • The centre is the nucleus which contains protons and nuetrons. There is always the same amount of proton as there is nuetrons.

2. Charge and Mass

   • Proton
     • Positive
     • 1
   • Nuetron
     • No charge
     • 1
   • Electron
     • Negative
     • Close to Zero (1/2000)

3. Periodic Table

   • Group Number
     • Number of electrons
   • Period Number
     • Number of shells