Using Lewis Valence Electron Dot Structures to Create a Personal Periodic Table
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1 Using Lewis Valence Electron Dot Structures to Create a Personal Periodic Table Mission: Use Power Point to create slides that express the arrangement of valence electrons in Lewis Dot Structure. To complete your mission, include the following: 1.! Discover why elements on the Periodic Table are grouped by periods using Lewis Dot Structure. 2.! Create Lewis Dot Structure for a list of elements. 3.! Categorize the Lewis Dot Structure into groups with similar properties. 4.! Organize the groups into a small Periodic Table. Materials (per student):! Lewis Dot Structure template! Periodic Table! Scissors Mission Instructions: Word Bank 1.! Look at the Periodic Table to determine the number of valence electrons for the following list of elements; Na, N, Al, C, O, Ca, Ne, K, P, B, Si, S, Be, Ar, Br, and Cl. 2.! Use the Template provided to create a Lewis Dot Structure for each element (16 elements.) 3.! Place the symbol for the element in the box and organize the valence electrons into the surrounding rectangles. Remember, place a single electron in each rectangle. Do not pair the electrons until you have no choice. 4.! For each element, fill in the correct number of shared and unshared electron pairs. 5.! From your knowledge of the octet rule and the number of valence electrons, predict the charge for each element if it were to become an ion. electron configuration Lewis Dot Structure electron dot structure 1
2 Mission Instructions (continued): 6. Cut out each Lewis Dot Structure. 7. Categorize the Lewis Dot Structure into groups by the number of valence electrons in the drawing. 8.! Organize the groups into a chart that reflects the periods found on the Periodic Table. 9.! One example has been completed for you. Word Bank electron configuration Lewis Dot Structure electron dot structure How to complete a Lewis Valence Electron Dot Structure Drawing: 1. Place the symbol of the element in the center box. 2.! Determine the number of valence electrons the element carries. 3.! Draw a single dot in any rectangle to represent an electron. 4.! Draw in additional valence electrons by placing single electrons in each rectangle. 5.! Do not pair the electrons together into rectangle until you have no choice and must pair them. 6.! Predict the ionic charge by counting how many unpaired electrons are represented in the drawing. If the element carries shared pairs of electrons, the element will assume a positive charge when it becomes an ion. Count the number of unshared electrons and correlate that number to the ionic charge. 7.! If the element contains at least one shared pair, it will assume a negative charge. Count the number of unshared electrons and correlate that number to the ionic charge. 8.! Elements with four valence electrons may assume a positive or negative charge. 9.! Elements with eight valence electrons will assume no charge. 2
3 Mission Assessment Questions! 1.! How many shared electron pairs does the Lewis Dot Structure for oxygen show?! 2.! How many unshared electron pairs can be found in the Lewis Dot Structure for chlorine?! 3.! Does a relationship exist between an element s number of valence electrons and the charge the element displays as an ion? 4. How many valence electrons will hydrogen and sodium each contain? Rubric and Grade Sheet Category Exceeds 3 points Meets 2 points Below 1 point SCORE Teacher Comments Content Mastery Included detail on all components and Key Concepts. Included some detail on most components and Key Concepts. Included little to no detail on components and Key Concepts. Vocabulary used all vocabulary and supported all content. used most vocabulary and supported most content. used little to no vocabulary and did not support content. Product Final product is attractive and all easily identified. Final product is somewhat attractive and most easily identifiable. Final product is not presented well, and difficult to identify. Oral Presentation (optional) The student can clearly dialogue and is able to convey their ideas in an organized manner. The student can somewhat dialogue and can somewhat convey their ideas in an organized manner. The student cannot clearly dialogue and their ideas are not conveyed in an organized manner. 3
4 0!"# 3 Fill in these Lewis Dot Structures and then cut each one out using scissors. 4
5 Fill in these Lewis Dot Structures and then cut each one out using scissors. 5
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