Electron Shells 0.0 / 5 ? ChemistryAtoms and compoundsGCSEEdexcel Created by: joshdCreated on: 29-03-14 16:07 What do electrons always occupy? Shells (sometimes called energy levels) 1 of 5 What are always filled first? The lowest energy levels are always filled first - these are the ones closest to the nucleus. 2 of 5 What are the number of electrons allowed in the shells? 1st shell: 2 2nd shell: 8 3rd shell: 8 3 of 5 When are atoms happier? When they have full electron shells. 4 of 5 What is it like in most atoms with the outer shell? What does this therefore make? In most atoms the outer shell si not full and this makes the atom want to react. 5 of 5
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