Physics 4.2.2 Flashcards
What happens when an Unstable Nucleus Decays?
It Emits Radiation, Called Nuclear Radiation.
What are the Different Types of Radiation? (3)
-Alpha.
-Beta.
-Gamma.
What is an Alpha Particle the Same as? Why?
Helium Nucleus. They both Consist of 2 Neutrons & 2 Protons.
What is the Charge on Alpha Particles?
+2.
What are Beta Particles?
Electrons.
What is the Charge on a Beta Particle?
-1.
What are Gamma Rays?
Electromagnetic Waves.
What type of Electromagnetic Wave has the Highest Energy?
Gamma Rays.
What Charge do Gamma Rays have?
No Charge.
What is the Range in Air of Alpha Radiation?
Few cm.
What is the Range in Air of Beta Radiation?
Few 10s of cm.
What is the Range in Air of Gamma Radiation?
Infinite.
What is Alpha Radiation Penetrated by?
Paper.
What is Beta Radiation Penetrated by?
Few mm of Aluminium.
What is Gamma Radiation Penetrated by?
Few mm Lead.
What is the Ionisation Power of Alpha Radiation?
High.
What is the Ionisation Power of Beta Radiation?
Medium.
What is the Ionisation Power of Gamma Radiation?
Low.
What happens to an Atom when it is Ionised?
The Number of Electrons it has Changes. This gives it a Non-Zero Charge.
What is a ‘Non-Zero’ Charge?
When an Atom is Ionised, the Number of Electrons it has Changes, giving it a Non-Zero Charge.
Why is Alpha Radiation the Most Ionising Radiation?
Because it has a Charge of +2.
The More Ionising a Form of Radiation, the ___ it will React with the Air it is Moving through.
Sooner.
___ Ionising Radiation has the Shortest Range in Air.
Strongly.
