Q27 of 31 Page 198

How do you appreciate the role of electronic configuration of the atoms of elements in periodic classification?

Electronic configuration


i. The characteristics of the groups and periods in the modern periodic table are because of the electronic configuration of the elements.


ii. It is the electronic configuration of an element which decides the group and the period in which it is to be placed.


iii. While going from top to bottom within any group, one electronic shell gets added at a time. From this we can say that the electronic configuration of the outermost shell is characteristic of a particular group.


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Collect the information about reactivity of VIII A group elements (noble gases) from intend or from your school library and prepare a report on their special character when compared to other elements of periodic table.

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Collect information regarding metallic character of elements of 1A group and prepare report to support the idea of metallic character increases in a group as we move from top to bottom.

 28

Without knowing the electronic configuration of the atoms of elements Mendeleff still could arrange the element nearly close to the arrangements in the Modern periodic table. How can you appreciate this?

 29

Comment on the position of hydrogen in periodic table.