Periodicity

This video shows the reaction of sodium and chlorine gas to produce sodium chloride
 * 3.3.1 Reaction of alkali metals with halogens**

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In the video below notice the color and state at room temperature of chlorine, bromine and iodine
 * 3.3.1 Similarities and differences in the physical properties of halogens**

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 * 3.3.1 Reactions between halogens and halide ions**

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The video below shows the reaction between liquid bromine and iodide ions (from sodium iodide) to form solid iodine (blue-black) and bromide ions

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This video below shows the reaction of chlorine gas and iodide ions to form iodine (yellow-brown) and chloride ions ** media type="custom" key="3345152"

3.3.1 Reaction of Alkali metals with water ** This video shows the reaction of sodium with water to produce sodium hydroxide and hydrogen gas(little concern for safety!!!). It shows the characteristic softness of the group 1 metals (can be cut with a knife) **. ** The reaction is highly exothermic causing the hydrogen gas produced to ignite and explode. **

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Task ** To create a 3 minute explanatory video to teach IB students about Periodicity. 1. Define, describe and explain trend in atomic radii for alkali metals (Li to Cs), halogens (F to I) and period 3 elements. 2. Define, describe and explain trend in ionic radii for alkali metals (Li to Cs), halogens (F to I) and period 3 elements. 3. Define, describe and explain trend in first ionization energy for alkali metals (Li to Cs), halogens (F to I) and period elements. 4. Define, describe and explain trend in electronegativity 5. Compare the relative electronegative of two elements and use these relative values to determine the nature of the bond formed between them. media type="custom" key="2691091" 1. Compare the similarities and difference in the reactions of alkali metals (Li, Na and K) with water. 2. Compare the similarities and difference in the reactions of alkali metals (Li, Na and K) with the halogens (Cl2, Br2 and I2). 3. Compare the similarities and difference in the reactions of the halogens (Cl2, Br2 and I2) and halide ions (Cl-, Br- and I-). 4. Describe the changes in the nature of the bonding (ionic, covalent) of the period three oxides. 5. Describe the changes in the acid base character of the period three oxides.
 * Schedule **
 * Lesson || Task Outline ||
 * October 22nd || Introduction – the task, process, responsibilities, time line, permission forms, rubrics ||
 * October 24th || Learning the Concepts ||
 * October 30th || Making the story board – what will be filmed and outline of script ||
 * November 3rd || Filming ||
 * November 5th || Video editing ||
 * November 10th || Video editing - Final video due by 4pm ||
 * November 12th || Viewing video’s and evaluation ||
 * 3.2 Physical properties **
 * 3.3 Chemical Properties **

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media type="custom" key="2691123" 1 . Describe the physical state (s, l, g) of the oxides of the third period in terms of their structure and bonding 2. Describe the electrical conductivity of the oxides of the third period in terms of their structure and bonding 3. Describe the physical state (s, l, g) of the chlorides of the third period in terms of their structure and bonding 4. Describe the electrical conductivity of the chlorides of the third period in terms of their structure and bonding 5. Describe using equations the reactions of chlorine and chlorides with water
 * 13.1 Trends across Period 3 **

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