A) Deuterium atom
B) Hydrogen atom
C) Doubly ionized lithium
D) Singly ionized helium
Correct Answer: C
Solution :
Radius of nth Bohr?s orbit of hydrogen like atom, \[{{r}_{n}}\propto \frac{{{n}^{2}}}{Z}\] Where, \[Z\] is atomic number, For first orbit \[n=1\] \[\therefore \] \[{{r}_{n}}\propto \frac{1}{Z}\] Now, for radius of first orbit to be minimum, its atomic number must be greater. Here in the problem, atomic number Z is greater for doubly ionized lithium and is Z = 3. Hence, for this system the radius of first orbit will be minimum.
You need to login to perform this action.
You will be redirected in
3 sec
