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He assumed the empty spaces belonged to elements that humans had simply not discovered yet. 🔮 The Famous Predictions
When these elements were finally discovered with properties almost identical to his predictions, the scientific community universally accepted his periodic system. gthbjlbxtcrfz nf
If the next heaviest element did not fit the chemical properties of the column, Mendeleev skipped a box and moved it to the column where it did fit. He assumed the empty spaces belonged to elements
How the differs from Mendeleev's original version The biography of Mendeleev himself Periodic Table of Elements - American Chemical Society gthbjlbxtcrfz nf