Properties Of Radiation
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What is the symbol for Alpha radiation and what is it made of?
α Alpha radiation consists of two protons and two neutrons.
Alpha radiation has a relative atomic mass of _______.
4 Alpha particles are made of two protons and two neutrons.
What is the charge of an Alpha particle?
+2e This positive charge is due to the presence of two protons.
Alpha radiation can be stopped by _______.
Thin Paper Alpha particles have a very limited range and can be stopped by thin materials.
What type of radiation is Beta?
Medium ionising Beta radiation consists of fast-moving electrons.
Beta particles can be stopped by _______.
A few mm of Aluminium Beta radiation has a range of 1 meter in air.
What is the charge of a Beta particle?
-e Beta particles are negatively charged electrons.
Gamma radiation is made of _______.
1 Photon Gamma rays have high ionising abilities
Gamma radiation can be stopped by _______.
A few cms of Lead or 1 meter of concrete It requires dense materials to effectively shield against gamma radiation.
What is the ionising ability of Gamma radiation?
Very low Gamma radiation has a very high ionising ability compared to Alpha and Beta radiation.
What is the relative atomic mass of a Beta particle?
1/2000 Beta particles are much lighter than Alpha particles and are sometimes considered to have 0 mass
What is the range of Alpha particles in air?
About 5cm Alpha particles have a very short range due to their mass and charge.
What is the ionising ability of Alpha radiation?
High ionising Alpha particles are more ionising than Beta and Gamma radiation.
What are Gamma rays used for?
• Killing cancer cells • Irradiating fruits • Sterilising medical equipment
What are Alpha particles used for?
• Used in smoke alarms
What are beta particles used in?
• To test welds in pipes • Maintain the same thickness of paper in paper mills