Chemistry 1.3 Electron shells or energy levels 0.0 / 5 ? ChemistryThe Periodic TableASWJEC Created by: DanCreated on: 26-12-13 12:42 What is meant by atomic orbitals? A region in an atom that can hold up to 2 electrons with opposite spins 1 of 8 How are these atomic orbitals filled? In order of increasing energy 2 of 8 What is meant by electronic configuration? The arrangement of electrons in an atom 3 of 8 Are all orbitals filled in order? No! 4s fills before 3d 4 of 8 What are the 2 elements with an unexpected configuration? Chromium and Copper. They end in 4s orbitals 5 of 8 Describe how electronic shielding works. Electrons from inner shells repel electrons from outer shells. Same signs repel 6 of 8 What is meant by '1st Ionisation level'? The amount of energy it takes to remove 1 mole of electrons from one mole of its gaseous atom 7 of 8 What makes up electronic attraction? Nuclear charge, electronic shielding and Atomic radius 8 of 8
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