Mendeleev ′ predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium.
(c) Classify these elements as metals, non-metals, or metalloids
(d) How many valence electrons are present in each one of them?
Mendeleev ′ predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium.
(c) Classify these elements as metals, non-metals, or metalloids
(d) How many valence electrons are present in each one of them?

Solution:

c) Gallium-Group 13 Period 4 is a periodic table of elements. The elements germanium and gallium are both metalloids; however, gallium is a metal.

d) Germanium contains four electrons, but Gallium has three valence electrons (the number of electrons in a molecule).