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Grants: TeachNet Adaptors 2009
Atomic Structure
Name: Rocheli Apilan
School: High School for Health Professions and Human Services
Address: 345 East 15th Street
City: New York, NY, 11229
Email rocheli_apilan@yahoo.com
Original Project: Atomic Structure
Author: P. Jackson
URL: http://teachnet.ie/pjackson/

How did you modify this unit for use in your own classroom?: I combined two units, namely, Emission Spectra and Flametest. For the 'Do Now', I showed the Flametest and asked the students to take notes on the flame color emitted for each element. Then, I showed a video on fireworks and asked students to identify the colors present and the corresponding element responsible for the emitted color. For the lesson proper: I discussed how line spectra are produced using the powerpoint and animation from Emission Spectra project. For the Assessment: It was a group work. I gave each group a standard line emission spectra and an unknown spectra. From the standard they were able to identify their unknown element.

List your primary instructional objectives for your students.

  The students will be able to relate experimental evidence to models of the atom.
  The students will be able to distinguish between ground state and excited state electron configuration.
  The students will be able to describe how line spectra are produced.
  The students will be able to identify an element by comparing its bright-line spectrum to given spectra.

What role did technology play in this curriculum unit?: Technology helps teachers relay abstract concepts to the students. Students can then visualize these concepts which help their understanding.

How did you assess and evaluate student performance?: I gave them a short quiz and group work activity.

Please tell us briefly about your background & teaching experience: I was teaching Chemistry in college for 16 years in the Philippines. This is my 5th year teaching Science and Chemistry here in New York

What are your recommendations for other teachers interested in adapting this unit?: The unit is really very useful for teaching how line spectra are produced.

Samples of Student Projects

  The student project helps students identify an element by comparing its bright-line spectrum to an unknown given spectra.
  Spectra2.doc
  Rochelli.doc
  spectraofGasDischarges.doc

 

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