The concept that contradicts the Bohr Model of an atom is:
1. | Rutherford Model | 2. | Heisenberg's Uncertainty Principle |
3. | J.J. Thomson Model | 4. | Photoelectric Effect |
An ion among the following that has the same radius as a hydrogen atom, having n=1, is
1.
2.
3.
4.
If the size of the first orbit of the hydrogen atom is 5.29 nm, the size of the second orbit of He+ is
1. 2.65 nm
2. 21.16 nm
3. 10.58 nm
4. 5.29 nm
Assertion (A): | The radius of the second orbit of He+ is equal to that of the first orbit of hydrogen. |
Reason (R): | The radius of an orbit in hydrogen-like species is directly proportional to n and inversely proportional to Z. |
1. | Both (A) and (R) are True and (R) is the correct explanation of the (A). |
2. | Both (A) and (R) are True and (R) is not the correct explanation of the (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |