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History of the Periodic Table: Difference between revisions
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== The Modern Periodic Table == | == The Modern Periodic Table == | ||
[[File: | [[File:Henry Moseley.jpg|left|thumb|150px|Henry Gwyn Jeffreys Moseley (1887-1915)]] | ||
Although Mendeleev's periodic table was brilliant, there were still some things wrong about it. The way that the elements were arranged still did not always group the elements that were similar. One of Ernst Rutherford's assistants, Henry Moseley, suggested that they develop a way to count the number of protons in an atom's nucleus. Once he created a way to do this, he realized they needed to revise the periodic table to make it more accurate, now that they could find the number of protons in an atom. He changed the periodic table and the periodic law. The modern periodic law states, "The properties of elements vary with their atomic numbers in a periodic way". <ref name=BJU/> | Although Mendeleev's periodic table was brilliant, there were still some things wrong about it. The way that the elements were arranged still did not always group the elements that were similar. One of Ernst Rutherford's assistants, Henry Moseley, suggested that they develop a way to count the number of protons in an atom's nucleus. Once he created a way to do this, he realized they needed to revise the periodic table to make it more accurate, now that they could find the number of protons in an atom. He changed the periodic table and the periodic law. The modern periodic law states, "The properties of elements vary with their atomic numbers in a periodic way". <ref name=BJU/> | ||
