Q24 of 60 Page 140

In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the periodic table later?

Germanium was the element which found the place later in periodic table but Mendeleev predicted germanium to as eka-silicon.

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22

Which of the following is the outermost shell for elements of period 2?

 23

Which of the following set of elements is written in order of their increasing metallic character?

 1

Write true or false for the following statements:

It was assumed by Newlands that only 63 elements existed in nature and no more elements would be discovered in the future.

 2

Write true or false for the following statements:

In order to fit elements into his table, Newlands adjusted three elements in the same slot, but also put some unlike elements in the same slot.