## Reflection: Flexibility Electron Configuration Part I - Section 5: Evaluate

This particular quiz had a lot of information on it (unit 2 lectures 1-5).  Last year I had two smaller quizzes, but this year I ended up combining information into one big quiz.  I think that I will definitely switch back to two smaller quizzes next year (one that covers lectures 1-2 and another one that covers lectures 3-5).

The benefit of the big quiz is that I was able to quickly determine the areas where students are not remembering information long-term.

First, on questions 4 and 5 dealing with mole conversions students often confused when to put 6.02 x 10^23  vs. molar mass.  As students did quiz corrections many were able to quickly figure out where they made their mistake, but this is something that I will make sure to review in detail before the exam.

On question 7 quite a few students did not round 87.62 correctly so did not calculate the correct number of neutrons (they had 49 instead of 50).  This is something that I made sure to help students with when they performed their quiz corrections and also something that I will make sure to review as I have students perform Bohr Models in the next lessons and during the review.

Finally, on question 8 I did not get as many correct answers as I had anticipated.  I was looking for students to say that he discovered a positive nucleus or positive center, but there were some interesting answers.

• Some students wrote that he discovered that particles went through the atom
• Some wrote that he discovered that there is a center (but not that it was positive)
• Some wrote that he discovered the electron

This shows that students need to review the major parts of history of the atom.  To help them review I have can have them perform a flow chart of discovery where they highlight each scientist with their major discovery.  I could also have each student at a group be in charge of one of the major scientists (Dalton, Thompson, Rutherford, and Bohr) and explain to their partners what that scientist discovered about the atom.

Impact of Quiz on my Teaching
Flexibility: Impact of Quiz on my Teaching

# Electron Configuration Part I

Unit 2: Unit 2: Matter, Atoms, and the Periodic Table
Lesson 6 of 11

## Big Idea: Electrons are located outside the nucleus in energy levels.

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90 minutes

### Rachel Meisner

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