Periodic Variation of Ionization Energy and Electron Affinity Lecture Demonstrations
Activities of Alkali Metals
Add small pieces of Li, K, Na to water, with universal indicator if desired, to show relative activities.
Hazards: K forms a peroxide coating that may explode when cut with a knife.
Displace I, Br from NaI and NaBr solutions with Cl2 (extract halogens into nonpolar solvent like hexane to make them more visible).
Show that I2 does not displace Cl2 from NaCl, etc.