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+The Early Periodic Table+
1) How Dalton put the elements into an order?
2) Why is Newland’s theory called the Law of Octaves?
3) What are the problems with his theory?		 +The Early Periodic Table+
1) In his book A New System of Chemical Philosophy Dalton arranged the elements in order of their mass, which he recorded from the results of chemical reactions.
2) Newland’s theory gets it name because every 8th element in Dalton’s theory had similar properties
3) Newland presumed that every element had been found, so completed his table even when the properties weren’t similar as his theory explained, also he used some elements twice to fill his table.
+The Early Periodic Table+
4) Why was Alexandre-Emile Beguyer de Chancourtois’s theory better than Newlands’s and why was it largely ignored?
5) How did Dmitri Mendeleev arrange the elements in the early periodic table?		 +The Early Periodic Table+
4) The work was better than Newlands’s because he worked on the same principals but produced a clear diagram to demonstrate his theory. However it was ignored because when it was published as the diagram was not included and so it was difficult to understand & it didn’t make a lot of sense.
5) The table was organised in order of atomic mass, but he then arranged this into a periodic pattern which meant that the chemical and physical properties were displayed also.
+The Early Periodic Table+
6) There were only 50 elements discovered when Mendeleev created his table, what did he do to make space for new elements?		 +The Early Periodic Table+
6) Mendelee left gaps for new elements in his table. However he left these gaps when the elements he had did not fit into the pattern that had appeared. Also once he had arranged the elements he did have he predicted the properties of the elements that were missing would have based on the tables patterns; once new elements began to appear their properties matched the ones which Mendeleev had predicted, and therefore fitted perfectly into the table.