Question

Name the element which where not known at that time of mendeleev?

Answer 1

Answer:

hy

Explanation:

In 1871, Mendeleev predicted the existence of a yet-undiscovered element he named eka-aluminium (because of its proximity to aluminium in the periodic table).

Eka-boron (scandium)

Eka-aluminium (gallium)

Eka-manganese (technetium)

Eka-silicon (germanium)

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Answer 2

Explanation:

geranium, gallium and scandium are the elements that were not known in the mandeleeve period.

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