Answer: Wavelength of light emitted when the electron in doubly ionized lithium makes a transition from E12 to E8 is 
Explanation:
Using Rydberg's Equation for hydrogen and hydrogen like atom:
Where,
= Wavelength of radiation
= Rydberg's Constant
= Higher energy level
= Lower energy level
We have:
The wavelength of the photon emitted when the hydrogen atom undergoes a transition is
Answer:
See Explanation
Explanation:
The experiment of Ernest Rutherford involved the bombardment of a thin gold foil with alpha particles from a radioactive source. A zinc sulphide screen was used to follow the movement of the alpha particles.
It was discovered that most of the alpha particles followed a straight path through the gold foil. Some of them were scattered through large angles and few were even scattered in the backward direction.
Since alpha particles were heavier than electrons, they must have been deflected by very strong forces.
These experimental evidences led to the conclusions stated in the question.
