1. The Periodic Table: Atomic Models and Periodic Squares (A Gnomus Chemistry Activity) © Gnomus, Inc. 2009 By Nome Baker, Ph.D., Nicole Ng, and Asya Grigorieva

2. About this Gnomus Periodic Table activity:  The following slides (best viewed in PowerPoint “Slide Show” format) illustrate the interactive web-based game that Gnomus @ IMSLI is developing.  Students should not refer to the Periodic Table during the game. Next slide →

3. Summary of the Periodic Square Activity:  There are 4 different periodic table game boards.  Each board has 4 missing periodic squares (one from each of 4 families).  Each board shows the corresponding atomic models for the missing squares.  Students will have 16 chances to match one of 4 periodic squares to the atomic model of a missing periodic square. Next slide →

4. Review of the Periodic Squares shown on the game boards: Go to the Key to the Game Board’s Atomic Models [Click] → Atomicmass units (amu) ←Atomic number Element’s symbol and name ← →

5. Key to the atomic models shown on the game boards: Go to “Find the missing Periodic Square….” [Click] →

6. Game Board No. 1: Find the missing Periodic Square in Family No. 1 Continue “Find the missing Periodic Square….” [Click] ↓

7. Find the missing Periodic Square in Family No. 1 Click on the Periodic Square that matches this atomic model:

8. Was Cl the right element?  How many total electrons are shown in the model, below?  How many protons?  How do you find element Cl’s atomic number in the periodic square?  Cl has a different atomic number than the missing element’s model. Click to try again → Click to review the key →

9. Was Ba the right element?  How many total electrons are shown in the model, below?  How many protons?  How do you find element Ba’s atomic number in the periodic square?  Ba has a different atomic number than the missing element’s model. Click to try again → Click to review the key →

10. Was Ar the right element?  How many total electrons are shown in the model, below?  How many protons?  How do you find element Ar’s atomic number in the periodic square?  Ar has a different atomic number than the missing element’s model. Click to try again → Click to review the key →

11. Was Li the right element?  How many total electrons are shown in the model, below?  How many protons in the model?  Right! They equal element Li’s atomic number shown in the periodic square.  You were right! Ten points! Click to review your answers → Click to review the key →

12. Why Li was the right element:  How many total electrons are shown in the model? Answer: 3 (1 of them a valence electron).  How many protons? 3 (+3 charge).  What is the missing element’s atomic number? Answer: 3, the no. of protons in the model, below.  Where do you find element Li’s atomic number in the periodic square? Answer: The number 3 in the lower right corner of the periodic square. Click to try another Periodic Game Board →

13. Periodic Game Boards Nos. 2 - 4 are shown in the next slides Only one of sixteen periodic square games is shown (see previous slides) in this presentation. Students will get sixteen chances to match a missing periodic square to its corresponding atomic model in the game being developed. Three other boards, shown next, are used for a total of 16 games (4 games/board). Students become familiar with the periodic squares from each of four different families. Next slide →

14. Periodic Game Board No. 2 and its four missing Periodic Squares The missing periodic squares are Na, Ba, Cl and Xe. The atomic model of each of these missing squares and 4 periodic squares will appear, one atomic model at a time. Students are asked to find the one periodic square that corresponds to the atomic model of the missing square. Next slide →

15. Periodic Game Board No. 3 and its four missing Periodic Squares Next slide → The missing periodic squares are K, Sr, I and Ne. The atomic model of each of these missing squares and 4 periodic squares will appear, one atomic model at a time. Students are asked to find the one periodic square that corresponds to the atomic model of the missing square.

16. Periodic Game Board No. 4 and its four missing Periodic Squares The missing periodic squares are Rb, Be, Br and Ar. The atomic model of each of these missing squares and 4 periodic squares will appear, one atomic model at a time. Students are asked to find the one periodic square that corresponds to the atomic model of the missing square. Next slide →

17. About this Gnomus Periodic Table activity:  The preceding slides illustrate the interactive web-based game that Gnomus @ IMSLI is developing.  If access to the internet is not available, the lesson may be carried out using game boards and the periodic squares, as was done in the classroom field testing of the unit. Next slide →

18. Addendum  This game serves as a review for students who have been introduced to the Periodic Table and are familiar with simple atomic models and concepts of atomic structure, including:  Atomic Mass  Electrons  Valence Electrons  Protons  Neutrons End the slide show →