This challenge task relates to the periodic table from the course book. In this challenge task, you will see how advances in scientific understanding are made by scientists developing the ideas of others and using creative thinking. Go through the reading material attached in the images and answer the following questions. 1. How did Johnn Dobereiner arrange elements? __________________________________________________________ ________________________________________________________ ______________________________________________________ 2. Suggest how Dobereiner ideas influenced John Newland idea? __________________________________________________________ ______________________________________________________ __________________________________________________ 3. Why did the pattern in Newland table not continue? __________________________________________________________ ______________________________________________________ __________________________________________________ 4. Describe how Dmitri Mendeleev modified Newland table? __________________________________________________________ ______________________________________________________ __________________________________________________ 5. Mendeleev table did not contain helium, argon or neon. Suggest why? __________________________________________________________ ______________________________________________________ __________________________________________________ 6. Look at the periodic table attached as an image, Which element would you expect to have similar properties to chlorine? __________________________________________________________ __________________________________________________ 7. How many elements are known today? __________________________________________________________ __________________________________________________ 8. Name atleast two elements that are made by scientists. These are sometimes called synthetic elements. __________________________________________________________ __________________________________________________
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omg
did you take it out of your book or somethinh dude
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