Practice Energy Levels And Spectra (2) - Theme E: Nuclear and Quantum Physics

Practise this section

9 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is a quantized energy level?
Show hintHide hint
Think about how electrons can only exist at certain levels.
Question 2.
What happens when an electron falls to a lower energy level?
Show hintHide hint
Remember the photon is released as light.
3Question 3.
What equation relates the energy of a photon to its frequency?
- E = mc^2
- E = hf
- E = h/λ
Show hintHide hint
Remember Planck's relationship with light.
4Question 4.
True or False: The absorption spectrum consists of bright lines against a dark background.
- True
- False
Show hintHide hint
Think about the absorption and emission processes.
Question 5.
An electron in a hydrogen atom transitions from n=3 to n=2. Calculate the energy of the photon emitted during this transition.
Show hintHide hint
You'll need to calculate the energy levels first.
Question 6.
Consider a star's light spectrum that shows an absorption line at a wavelength of 500 nm. Research which element's absorption corresponds to this wavelength.
Show hintHide hint
Look up elemental spectra for context.

5 more questions in this section. Enroll free to practise them all.