A. Answer the following questions: 1. Who proposed the theory that electrons in
ID: 963101 • Letter: A
Question
A. Answer the following questions:
1. Who proposed the theory that electrons in an atom orbit in well-defined orbits around the nucleus?
2. The phenomenon when electrons are ejected from a metal surface if light of a high enough frequency hits the surface of the metal.
3. Why does hydrogen form a line spectrum rather than a continuous spectrum (you can actually answer this question by writing only three words)?
4. There is a fundamental limitation to just how precisely we can know both the position and momentum of a particle at a given time. This principle is named after which scientist?
Explanation / Answer
ANSWER
1. This theory was proposedby Neils Bohr.
2. This phenomenon is called photoelectric effect.
3. Becaus ethe energy levels are quantised
4. This pronciple is named after Heisenberg.