Question

Mendeleev predicted the existence of certain elements not known at that time and named
two of them as Eka-Silicon and Eka-Aluminium.
i) Name the elements which have taken the place of these elements.
ii) Mention the group and the period of these elements in the modern periodic table.
iii) Classify these elements as metals, non-metals or metalloids.
iv) How many valence electrons are present in each of them?

Answer 1

Hey Friend !!

Here is your answer..

i). eka-silicon --- germanium and eka-aluminium --- gallium

ii). group of germanium --- 14 ; period of germanium --- 4 & group of gallium --- 13 ; period of gallium --- 4

iii). Both are metals.

iv). Valency of germanium --- 4 & valency of gallium --- 3

Answer 2

Hi frnd...here is ur answer...

1.

Germanium (Ge) and Gallium (Ga)

2.

Group 14; Period 4 and Group 13; Period 4

3.

Ge — Metalloid; Ga — Metal

4.

Ga — 3; Ge — 4

Hope this will help u... please mark it as brainliest....