Day 4: Periodic Properties
Today we consider how an electron in an outer orbital is screened from an atom’s positive nuclear charge by electrons in inner orbitals. This idea is applied to atomic properties that vary with position in the periodic table: atomic radius, ionization energy, and electron affinity. We also consider how electrons can be gained by or lost from atoms to produce ions and how the relative sizes (radii) of ions can be predicted using the periodic table. Finally the relation between unpaired electrons and magnetism is explored.
Here are links to all sections of the work for Day Four. Be sure to complete them before your whole-class meeting.
D4.2 Periodic Variation in Atomic Radius
D4.3 Periodic Variation in Ionization Energies
D4.4 Periodic Variation in Electron Affinities
D4.5 Electron Configurations of Monoatomic Ions
D4.6 Ionic Radii
D4.7 Unpaired Electrons and Magnetism
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