Radioactivity

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GCSE Science (Physics) Karteikarten am Radioactivity, erstellt von Alfonzzzo R am 25/08/2015.
Alfonzzzo R
Karteikarten von Alfonzzzo R, aktualisiert more than 1 year ago
Alfonzzzo R
Erstellt von Alfonzzzo R vor mehr als 9 Jahre
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Frage Antworten
Radioactivity GCSE Physics P2.5
Name the three types of radiation. Alpha, Beta and Gamma.
Which type of radiation has the most penetrating power? Gamma.
Which type of radiation has the least penetrating power? Alpha.
Which type of radiation has the longest range? Gamma.
Which type of radiation has the shortest range? Alpha.
Which type of radiation is the most dangerous to humans, when outside of the body? Why? Gamma. It can enter the body very easily.
Which type of radiation is the least dangerous to humans, when outside of the body? Why? Alpha. It is prevented from entering the body by the skin.
Which type of radiation is the most dangerous to humans, when inside of the body? Why? Alpha. It is more likely to hit any cells.
Which type of radiation is the least dangerous to humans, when outside of the body? Why? Gamma. It is less likely to hit any cells.
Which types of radiation are affected by magnetic fields? Alpha and beta.
What charge do each of the types of radiation have? Alpha: +2. Beta: -1. Gamma: ±0.
What is an alpha particle made of? Two neutrons and two protons. OR A helium nucleus.
What effect does an alpha particle have on the: i) Atomic mass? ii) Atomic number? i) Goes down by 4. ii) Goes down by 2.
What is a beta particle made of? An (high energy) electron.
What effect does a beta particle have on the: i) Atomic mass? ii) Atomic number? i) Stays the same (no effect). ii) Goes up by 1.
Why does the atomic number go up when a beta particle is released? A neutron is split into a proton and an electron. The electron is then released (this is the beta particle). Therefore the particle gains a proton.
What is a gamma particle made of? High energy electromagnetic radiation.
What effect does a gamma particle have on the: i) Atomic mass? ii) Atomic number? i) Stays the same (no effect). ii) Stays the same (no effect).
What is the range in air for the different types of radiation? Alpha: 25cm. Beta: 10-100m. Gamma: Kilometres.
Name a use for each type of radiation. Alpha: Smoke alarms. Beta: Thickness of metal in production. Gamma: Sterilising medical equipment.
What are the different types of radiation stopped by? Alpha: A sheet of paper. Beta: A few millimetres of aluminium. Gamma: A few centimetres of lead.
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