Randomized to Organized lesson - completed & available
The key devices are: a 3D Forever Periodic Table Model of the Alexander Arrangement of Elements, introduced at the end of the lesson; a 3 part PowerPoint called PAST AND PRESENT ARRANGERS OF CHEMICAL ELEMENT SYSTEMS used throughout, in 3 segments, and the TrendsTube® 3D element property reference device.
Students will engage in first hand experience of how the periodic table was originally mapped accompanied by an introductory PowerPoint of pre-periodic table history.
Given a sheet of group 1a and 2A element jumbled property data boxes students will sort them into categories and position them based only on the data they bear using simple logic with numbers.
Students will explore and discover property relationships, organize according to one, then another without altering the first, which they will discover requires a three-dimensional solution.
At appropriate points during the lesson, students will view another segments of the periodic table history slides and hold related discussions related to the technology advances that contributed to each improvement in understanding the organization of the elements.
The TrendsTube
will be used when describing the valence concept, followed by revealing the 3D Forever when appropriate in the PowerPoint.
Despain & Alexander 2014
Trends lesson segment - completed & available
The key device is a downloadable (free) printed chart consisting of the Main Group Elements from the 2nd to the 6th row, the TrendsTube®. Groups are titled with the old and new IUPAC designations. Element box data is symbol, atomic number, mass, and element name.
Intended for use prior to introduction of the periodic table - flat or AAE - this can be the whole or part of an element property trends lesson.
When all students have a TrendsTube®, teaching proceeds about properties and trends as usual.
When discussing valence and ionization energy, the students will trim and tape their page into a tube.
The rows of element boxes slant a full box height down from the left, and when wrapped and joined during the lesson, this allows the Noble Gases to be adjacent to both elements that 'want' to be like them - one with an electron more and one with one less - in atomic number sequence.
This is similar to the Main Groups column on the 3D Forever AAE, and so is highly recommended to be used when the Forever is to be the core of the introduction to the periodic table to follow, although the TrendsTube® is an improvement over the usual flat charts, so can be used even if the PT Intro Lesson is to be with them.
Despain & Alexander 2014
Past & Present Arrangers of Chemical Element Systems PowerPoints - completed & available
Three independent PowerPoints highlight a personage-oriented history of the development of element concepts and illustrations from ancient history leading to the current operative periodic tables for study and professional use.
Having the students understand the need for order (and how to attain it) in a knowledge presentation is the core purpose of the Randomized to Organized lesson plan.
These PowerPoints are designed to provide additional aid to the teacher who wishes to help students understand the process of arriving at the first periodic table, the minds and methods of improving on it in many ways, and the probability that the process is incomplete even now. NGSS, and particularly Crosscutting, is particularly well related to the historic backstory, creative genius', and technology of the later builders of periodic tables.
Science: Chemistry, scientific methods, parts of atom, etc.
Technology: Moseley: spectra, Seaborg: radioactivity, Lavoisier: experimentation
Engineering: sorting and arranging. de Chancourtois: geology charting tool familiarity led to cylindrical/helical portrayal of element arrangement. Seaborg: Actinides moved outside the main table to join the Lanthanides. Alexander: removing gaps in atomic numbers integrated the d- and f-blocks with the main group.
Math: determination of percentages and other measurements, numeracy in general
History: From Ancient Greeks through the European Middle Ages up to the present
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