Physics 4.2.1 Flashcards
Why are some Atomic Nuclei Unstable?
Because of an Imbalance in the Forces within the Nucleus. Forces exist between the Particles in the Nucleus.
Which is Unstable: Carbon-12, or Carbon-14? Why?
The Isotope Carbon-14 has 2 extra Neutrons, so it is Unstable.
What can Unstable Nuclei do to become more Stable?
Emit Radiation.
What can Radiation be in the Form of? (2)
-High Energy Particle
-High Energy Wave.
As the Radiation Moves Away from the Nucleus, it takes some Energy with it. What does this do to the Nucleus?
This Reduces the Overall Energy of the Nucleus, therefore making it more Stable.
What is ‘Radioactive Decay’?
The Process of Emitting Radiation .
Radioactive Decay is a ___ Process.
Random.
What do you call Objects that Contain Radioactive Nuclei?
Sources of Radiation.
What is the ‘Radioactive Activity’ of a Radioactive Source?
The Rate at which the Unstable Nuclei from a Source of Radiation Decays.
Wat is Radioactive Activity Measured in?
Becquerels, Bq.
What Equipment is Used to Detect Radiation?
Geiger-Muller Tube.
