If the nuclear radius of ²⁷ Al is 3.6 Fermi , the approximate nuclear radius of ⁶⁴ Cu in Fermi is

Step-by-step solution

Nuclear radius r A^ 1 / 3 , where A is mass number aligned & r=r₀ A^ 1 / 3 & r=r₀(27)^ 1 / 3 =3 r₀ & r₀= 3.6 3 =1.2 fm aligned For ⁶⁴ Cu aligned r & =r₀ A^ 1 / 3 & =1.2 fm (64)^ 1 / 3 & =4.8 fm aligned