Define atomic radius.

Define cationic radius and anionic radius. How radius changes upon ion formation?

In a period of representative elements, the decrease in ionic radius when compared with the corresponding decrease in atomic radius

Among the III A group elements, the difference in the atomic radius large in between

Among the III A group elements, the difference in the atomic radius is large in between

Which of the following pair of elements have same atomic radius

Which of the following pair of elements have same atomic radius

Which of the following pair of elements have same atomic radius

The elements in which of the following have most nearly the same atomic radius

Define atomic mass number.

Define atomic number.