Embedded Files
objectives
objectives
- Identify Alpha, Beta and Gamma Emissions by:
- Their Nature
- Their Relative Ionising Effects
- Their Relative Penetrating Abilities
- Recognise the general term Ionising Radiation can be used to describe radioactive emissions
starter activity
starter activity
represent these isotopes using nuclide notation.
Alpha Decay
Alpha Decay
In Alpha Decay - Unstable Nuclei Emit HELIUM NUCLEI that consist of 2 protons and 2 neutrons
When a Nuclei undergoes ALPHA DECAY the ELEMENT CHANGES AS THE PROTON NUMBER DECREASES BY 2 and the MASS NUMBER DECREASES BY 4
Alpha - Ionising Power and Penetrating Power
Alpha - Ionising Power and Penetrating Power
Alpha particles are STRONGLY IONISING - They have the energy to IONISE over 10,000 atoms!
As they are so ionising they soon run out of energy and therefore cannot penetrate effectively - They are stopped by SKIN or PAPER!
Beta Decay
Beta Decay
In Beta Decay - Unstable Nuclei Emit Electrons
When a Nuclei undergoes BETA DECAY the ELEMENT CHANGES AS THE PROTON NUMBER INCREASES BY 1 and the MASS NUMBER STAYS THE SAME as a NEUTRON DECAYS
Beta - Ionising Power and Penetrating Power
Beta - Ionising Power and Penetrating Power
Beta particles are IONISING - They have the energy to IONISE over 100 atoms!
As they are not as Ionising as Alpha Particles - Beta Particles can Penetrate Skin but are stopped by ALUMINIUM
Gamma Rays
Gamma Rays
In Gamma Decay - Unstable Nuclei Emit GAMMA RADIATION
When a Nuclei undergoes GAMMA DECAY the MASS AND PROTON NUMBERS STAY THE SAME
Gamma Rays - Ionising Power and Penetrating Power
Gamma Rays - Ionising Power and Penetrating Power
Gamma rays are WEAKLY IONISING - They have the energy to IONISE 1 atom!
As they are not as Ionising as Beta Particles - Gamma Rays can Penetrate Skin and Aluminium but are stopped by Lead.
types of emission activity
types of emission activity
Summarise the above notes by filling in the table below
article activity
article activity
Read the article ‘Marie Curie and the Perils in Radium’ and
WRITE 3 PARAGRAPHS SUMMARISING THE PERILS OF RADIUM - INCLUDE INFORMATION ON IONISING AND PENETRATING POWER
You must use the hamburger peel to form your paragraphs!
Click on the PICTURE for the article
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