Asked by Johnson the third
The Periodic Puzzle in achieve3000
Based on information in the article, which of these happened last?
Newly discovered elements filled gaps left in the periodic table.
John Newlands arranged elements according to their atomic weight.
Dmitri Mendeleev organized elements based on properties and atomic weight.
Heavy elements proved the "Law of Octaves" false.
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Answered by
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Newly discovered elements filled gaps left in the periodic table.
Reason: Newlands' Law of Octaves came first (mid-1860s), Mendeleev organized the table in 1869, heavier elements soon showed Newlands' law didn't hold, and only later (e.g., gallium 1875, scandium 1879, germanium 1886) were the elements discovered that filled Mendeleev's predicted gaps.
Reason: Newlands' Law of Octaves came first (mid-1860s), Mendeleev organized the table in 1869, heavier elements soon showed Newlands' law didn't hold, and only later (e.g., gallium 1875, scandium 1879, germanium 1886) were the elements discovered that filled Mendeleev's predicted gaps.
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