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Question 47(c)
Mendeleev ′ predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium.

Classify these elements as metals, non-metals or metalloids


Solution

Eka-silicon (Ge) is known as germanium and is a metalloid.
Eka-aluminium (Ga) is known as gallium and is a metal.

Chemistry
NCERT Exemplar
Standard X

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