Chapter 5: Periodic Classifications of Elements

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Periodic Classifications of Elements


Besides gallium, which other elements have since been discovered that were left by Mendeleev in his periodic table?


Mendeleev kept vacant places in the periodic table for elements not discovered till then. Three of these unknown elements were given the names eka-boron, eka-aluminium, and eka-silicon from the known neighbors. The ‘eka-aluminium’ stands for gallium, ‘eka-boron’ stands for scandium and ‘eka-silicon’ stands for germanium.

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