Introduction: The Atom – Then and Now!

"This lesson was developed in the course Teaching with WebQuests , a course offered by the Teacher Education Institute ".


he students will create a timeline describing the progression of the atomic models from the very first conception of the atom until the current model of the atom – the quantum mechanical model of the atom. Their timeline should include all of the major discoveries and theories of the atom. They should understand that the various scientists that contributed to the various models of the atom did not start from scratch each time. They started with what the scientist before them had already reasoned out and went from on there, either adding new information or revising and reworking what did not work with previous model. Their timelines should, hopefully include explanations of the problems and/or limitations of each model that inspired the next scientist to do research in that area. They will also come away with a comprehensive view of the atom, how the current model came about and how the personality and personal experiences of each scientist can affect their view points and their problems and success’. The students can create a Power Point presentation or a book style – like a scrapbook.

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