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Variation of Valency

d Mendeleev p...

Question

Question 47(d)
Mendeleev predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium.
How many valence electrons are present in each one of them?

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Solution

Eka-aluminium is galium (Ga) contains 3 valence electrons. Eka-silicon is germanium (Ge) contains 4 valence electrons.

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

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

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What is the group and the period of these elements in the Modern Periodic Table.

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Variation of Valency

Standard X Chemistry

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