Which of the following elements was predicted by Mendeleev in 1869 before its discovery in 1879 in Scandinavia?

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Mendeleev predicted the existence of an element with similar properties to boron and aluminum, calling it eka-boron. This element was later discovered and named scandium (Sc) in 1879. Gallium (Ga) and germanium (Ge) were predicted by Mendeleev as missing elements in his periodic table, but he did not provide specific predictions for their properties.

Which of the Following Elements Was Predicted by Mendeleev in 1869