What causes this trend of atomic radius

this is the answer, i dont know what test youre doing but i hope it helps

Explanation:

the amount of electrons in the entire atom, each shell has its own amount so, the first shell contains 2, which is closest to the nucleus. the next one has 8, 3rd has 18, and so on.

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.

the answer to this question is 3.