Question

Explain the trend of the
(a) atomic radii ​

Answer 1

Answer:

atomic raddi in moving down in group is increasing due to increasing in no of shells and in moving down from left to right becomes decreasing due to increasing nuclear effect I hope you understand

Answer 2

Atomic radii of the elements of the transition series decrease gradually from left to right.

As we move across a transition series from left to right, the nuclear charge increases by one unit at a time.

The last filled electron enters a penultimate (n - 1)d subshell. However, d orbitals in an atom are less penetrating or more diffused and, therefore d electrons offer smaller screening effects.

The result is that effective nuclear charge also increases as the atomic number increases along with a transition series. Hence, the atomic radii gradually decrease across a transition series from left to right.

hope it helps you :)