What will be the Bohr’s atomic radius for the first orbit of Li (Z=3). Given : Bohr’s atomic radius of hydrogen at first orbit is 0.51 Å.

What will be the Bohr’s atomic radius for the first orbit of Li (Z=3

1.	What will be the Bohr’s atomic radius for the first orbit of Li (Z=3). Given : Bohr’s atomic radius of hydrogen at first orbit is 0.51 Å.
Answer» of the nth ORBIT of an ELECTRON is GIVEN by r n =ro Zn2 For HYDROGEN atom, Z=1 ⟹ r n =ro n2 So, for third orbit n=3 Thus radius of third orbit r 3 =r o ×3 2 =9r o u can use this to find the answer