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Eka-aluminium and Eka -silicon are known...

Eka-aluminium and Eka -silicon are known as :

A

Gallium and germanium

B

Aluminium and silicon

C

Iron and sulphur

D

Proton and silicon

Text Solution

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The correct Answer is:
A
NA
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The three elements predicted by Mendeleev from the gaps in his periodic table were known as eka-boron, eka-aluminium and eka-silicon. What names were given to these elements when they were discovered later on?

Assertion (A): Mendeleev left the gap under aluminium and silicon and called these Eka-aluminium and Eka-silicon, respectively. Reason (R): Dobereiner arranged elements on the basis of increasing atomic number.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as : Assertion (A) : Mendeleev' left the gap under aluminium and silicon and called these Eka-aluminium and Eka-silicon, respectively. Reason (R) : Dobereiner arranged elements on the basis of increasing atomic number.