Mendeleev predicted the existence of certain elements not known at that time and named two of them as Eka-Silicon and Eka-aluminium
(a) Name the elements which have taken the place of these elements
(b) Mention the group and the period of these electron in the modern periodic table
(c) Classify these elements as metals, non-metals or metalloids
(d) How many valence electrons are present in each one of them ?

Mendeleev's predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Name the elements which have taken the place of these elements.

Mendeleev's 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?

Mendeleev's predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Classify these elements as metals, non-metals or metalloids.

Mendeleev's predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Mention the group and the period of these elements in the Modem Periodic Table.

Mendeleve predicted the exitence of certain elements not known at that time and named to of them as eka-aluminium and eka-silicon. (a) Name the element which has taken the place of (i) eka-aluminium, and (ii) eka-silicon (b) Mention the period/periods of these elements in the modern periodic table. (c) Write the group/groups of these elements in the modern periodic table. (d) Classify these elements as metals, non metals or metalloids. (e) How many valence electrons are present in the atoms of each these elements?

Name two elements of first period in modern periodic table.

Write the formulae of chlorides of Eka-Silicon and Eka-aluminium, the elements predicted by Mendeleev.

In modern periodic table, by which name d-block elements are known ?