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 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 elements in the Modern Periodic Table. c] Classify these elements as metals, non-metals, or metalloids. d] How many valence electrons are present in each?

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 predicted the existence of certain elements not know at that time. He named two of these elements as eka-aluminium and eka-silicon. a. Name the elements which have taken the place of these elements. b. Mention the group and period of these elements in the modern periodic table. c. Which one of these two elements is a metalloid? d. How many valence electrons are present in eka-silicon? e. Eka-aluminium forms a chloride. What is its formula?

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?

The element eka-boron in Mendeleev's periodic table is known as_____in the Modern periodic table

Go through the Modern periodic table (fig2.1) and write the names one below the other of the elements of group 1. How many valence electrons are there in each of these elements ?