Question

why atomic size is diffcult determiming i terms of atomic radius​

Answer 1

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Determining the atomic radii is rather difficult because there is an uncertainty in the position of the outermost electron – we do not know exactly where the electron is.An atom will have different radii depending on the bond it forms; so there is no fixed radius of an atom.

Answer 2

Answer:

Determining the atomic radii is rather difficult because there is an uncertainty in the position of the outermost electron – we do not know exactly where the electron is. This phenomenon can be explained by the Heisenberg Uncertainty Principle.