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- [Annenberg Learner Chemistry Challenges and Solutions], This unit is Unit 4 Organizing Atoms and Elements The Periodic Table
- After clicking above link, you need to go to the appropriate Unit and click on the VoD box to get the video box that will appear on the top left of screen.
- Sometimes you do not get the video box so check to see if pop-up is disabled and reclick the VoD box
Answer the following question from watching the video. <b>