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Ch.3 Ionic CompoundsWorksheetSee all chapters
All Chapters
Ch.1 Matter and Measurements
Ch.2 Atoms and the Periodic Table
Ch.3 Ionic Compounds
Ch.4 Molecular Compounds
Ch.5 Classification & Balancing of Chemical Reactions
Ch.6 Chemical Reactions & Quantities
Ch.7 Energy, Rate and Equilibrium
Ch.8 Gases, Liquids and Solids
Ch.9 Solutions
Ch.10 Acids and Bases
Ch.11 Nuclear Chemistry
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions

Electron Affinity is the energy released from the addition of an electron to a gaseous atom or ion.

Electron Affinity

Concept #1: Electron Affinity

Concept #2: Periodic Trend

Generally, electron affinity increases moving from left to right across a period and going up a group.

Example #1: Which of the following halogens will release the most energy with the addition of an electron?

Practice: Determine which atom in the following set has the largest electron affinity: N, O, C, B, Ne

a) N                              b) O                             c) C                              d) B                              e) Ne

Practice: Rank the following elements in order of increasing electron affinity: Cs, Hg, F, S

Practice: Which one of the following atoms has the least tendency to gain another electron?