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WS_Science By You Activity_Periodic Trends Lab

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+ ward ' s science Page 2 Periodic Trends Lab: 3D Graphing (student handout) Objective: To understand how certain properties of elements on the periodic table increase or decrease as you look across the periodic table. Materials: • Connecting cubes • Periodic Table Trend Mat • Tables of Adjusted and Actual Values for Select Elements Pre-Lab Questions: Answer in complete sentences. A. What would you guess "ionization energy" of an element means? B. What would you guess atomic radius of an element means? C. Electronegativity is a measure of an atom's attraction for electrons in a chemical bond. Which group of elements would you guess to be the most likely to steal electrons. Defend your answer. Procedure: The properties of ionization energy, atomic radius and electronegativity for each representative element are given in the data table. The values given are not the true values of these properties, but are proportional. This will make your lab easier. 1. The adjusted value of each property represents how many blocks to stack for that element. The blocks should stand up on the placemat. For example, if the adjusted value for ionization energy of Hydrogen is 3, then you would stack three blocks and place them on the periodic table mat provided by the teacher in the Hydrogen square. 2. When you finish each 3-D graph, you will see some stacks of blocks are higher on one side compared to the other. You might also notice one corner is much higher than the opposite corner. 3. Answer the questions about your graph before making the next 3-D graph. Name: Class: Date:

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