What are zero group elements ? Give the electronic configuration of first four of them. Why are they called gases ? How xenon difluoride is prepared ?

What are zero group elements ? Give the electronic configuration of the first four of them. Why zero group elements are also known as inert gases ?

What is the electronic configuration of first row transition elements?

What are electronic configuration of Group 18 elements of this group.

What is the general outer electronic configuration of Group-IVA (Gr-14) elements ?

What is the electronic configuration of the element of atomic number 22. To which group of the periodic table does it belong ?

Chromium is used extensively in steel alloys. It is extracted from its ore chromite (FeCr_(2)O_(4)) , Which contains chromium in +3 oxidation state. (i) Give the electronic configuration of the elements iron and chromium. (ii) What is the oxidation state of iron in chromite ?

How will you account for the formation of xenon flurides ? Give the preparation and structures of xenon difluoride and xenon tetrafluoride .

The electronic configuration of an element in 1s^2 ,2s^2 , 2p^6 , 3s^2 , 3p^6 . In which group of the periodic table will it be placed and why ?