ch 6 chem - Nadine Ghourra Ms.Valerie Chapter 6 Assessment 20 November 2019 25-1 Explain how Mendeleev\u2019s periodic table was in error After several new

ch 6 chem - Nadine Ghourra Ms.Valerie Chapter 6 Assessment...

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Nadine Ghourra Ms.Valerie Chapter 6 Assessment 20 November 2019 25-1. Explain how Mendeleev’s periodic table was in error. - After several new elements were discovered and the atomic masses of the known elements were more accurately determined, it became apparent that several elements in his table were not in the correct order. Arranging the elements by mass resulted in several elements being placed in groups of elements with differing properties. 26-2. Explain the contribution of Newlands’s law of octaves to the development of the modern periodic table. - Newland's law of octaves stated that elements properties repeated every eighth element. While this was not completely correct it did lead to the idea of a periodic pattern in the properties of elements. 27-3. Lothar Meyer and Dmitri Mendeleev both proposed similar periodic tables in 1869. Why is Mendeleev generally given credit for the periodic table? - Mendeleev’s work was published first and he did more work to show periodic trends.
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