Periodicity

Periodic Trends Class Activity

Periodic Trends Computer Simulation A computer simulation providing data for student to explore the periodic trends with respect to atomic radius, first ionization energy, electron affinity, ionic size, etc.

Ionization Energies of Elements Computer Simulation

Activity Series of Metals Computer Simulation provides students with the tools to develop their own activity series of metals. In this activity, students will run simulated tests of various metals in aqueous solutions to determine the relative reactivity of these metals. A total of eight metals will be observed in various combinations with the corresponding metal nitrate solutions and hydrochloric acid. Students will interpret the data collected to construct an activity series of the elements used in this simulation (AACT, 2021). An effective guided-inquiry student tutorial is available.

When a large halite crystal, NaCl(s), is struck with a hammer, it cleaves evenly, 90° straight edges. When a large calcite crystal, CaCO3(s), is struck with a hammer, it cleaves at a slant angle. A crystal of halite, sodium chloride, does not conduct, but when it is pulverized and dissolved it does conduct. A crystal of calcite, calcium carbonate, when placed in water does not dissolve.

Lithium, sodium, and potassium react vigorously with water.

Hardware illustrates the nature of periodicity.