Topic 8: Spectroscopy, Video B: Calculating Energy Differences

Question 1

When an electron absorbs just the right amount of energy the electron is excited to a higher or lower energy level? (n=1 to n=2) or (n=2 to n=1)?

Answer 1

A higher energy level. n=1 to n=2.

Question 2

When an electron emits just the right amount of energy the electron decays to a higher or lower energy level? (n=1 to n=2, or n=2 to n=1)?

Answer 2

A lower energy level. (n=2 to n=1). (A relaxation.)

Question 3

When electron goes from a higher energy shell to a lower energy shell energy is released in the form of what?

Answer 3

A photon.

Question 4

The measurement of a photon is called what?

Answer 4

Spectroscopy.

Question 5

What is the equation for change in energy of an electron?

Answer 5

Change of energy in an electron = E final-E initial