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- 1Who discovered the nucleus?Ernest Rutherford
- 2What is the experiment called that led to the discovery of the nucleus?The alpha particle scattering experiment
- 3Describe the experiment Rutherford did to discover the nucleusHe fired alpha particles at a piece of gold foil
- 4Outline his findings and explain each oneSome particles passed straight through- the atoms are mainly empty space
Some bounced straight back or were deflected to the side- there is a dense nucleus in the middle - 5Which is the most ionising type of radiation?Alpha
- 6What is the most penetrating type of radiation?gamma
- 7What material can block alpha radiation?A sheet of paper
- 8Which material stops beta?A thin sheet of metal e.g. aluminium
- 9What material stops gamma?A thick lead plate
- 10What is a use of alpha radiation?Smoke alarms
- 11What is contamination?The unwanted prescence of materials containing radioactive atoms on other materials
- 12What is irradiation?When an object is exposed to ionising radiation but doesn't become radioactive
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- Fichas sobre Sin título, creado por Amber Groocock el 12/12/2019.
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