Why does this happen (R,r stands for radius) Please explain in an easy way I already - Chemistry -

Question

Why does this happen?(R,r stands for radius) Please explain
in an easy way
I already have prior knowledge of s,p,d and f subshell and
screening effect
Thnx!

Q Transition metals :

sc   Ti   v   cr r   decreases    
                 
      Mn   Fe   Co   Ni R   =
constant

Mohan Kumar · Accepted Answer

Trends in radius for transition metal
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Why does this happen?(R,r stands for radius). Please explain in an easy way. I already have prior knowledge of s,p,d and f subshell and screening effect. Thnx! Q. Transition metals : sc Ti v cr r decreases Mn Fe Co Ni R = constant

Why does this happen?(R,r stands for radius). Please explain in an easy way.
I already have prior knowledge of s,p,d and f subshell and screening effect.
Thnx!

Q. Transition metals :

$\frac{sc Ti v cr}{r decreases} \frac{Mn Fe Co Ni}{R = constant}$