Which were the elements predicted by Mendeleev in his periodic table? Options: A . &nbsp eka-aluminium ( E a ) B . &nbsp eka-boron ( E b ) C . &nbsp eka-carbon ( E c ) D . &nbsp eka-manganese ( E m )

Which were the elements predicted by Mendeleev in his periodic table?

Question

Which were the elements predicted by Mendeleev in his periodic table?

Options:

A . eka-aluminium (

E_{a}

)

B . eka-boron (

E_{b}

)

C . eka-carbon (

E_{c}

)

D . eka-manganese (

E_{m}

)

Answer: Option A
:
A, B, and D
When Mendeleev proposed his periodic table, he noted gaps in the table and predicted that unknown elements exist with properties appropriate to fill those gaps. The four predicted elements- eka-boron (

E_{b}

), eka-aluminium (

E_{a}

), eka-manganese (

E_{m}

) and eka-silicon (

E_{s}

) proved to be good predictors of the properties of scandium, gallium, technetium and germanium respectively, with each filling the spot in the periodic table assigned by Mendeleev.

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