6.1.5 - Radiation in and out of Atoms Flashcards
1
Q
What is a photon?
A
A little packet of energy.
2
Q
What is a photon another way to talk about?
A
Electromagnetic radiation.
3
Q
What is radiation in and out of atoms an explanation of?
A
Why negative electrons and positive electrons don’t attract and spiral into the nucleus.
4
Q
What state are electrons in when they have jumped to a higher energy level?
A
‘Excited’.
5
Q
How can you ‘excite’ electrons in a gas?
A
With an electric current.
6
Q
What can a photon with enough energy do to an electron?
What is this called?
A
Remove an electron from the atom.
Ionising the atom.
7
Q
What are examples of photons that have enough energy to ionise an atom?
A
UV, X-ray and gamma frequencies.
8
Q
What happens when electrons go from a higher to a lower level?
A
They emit radiation.
