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<math>{}_{88}^{226}Ra</math>
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==Key Stage 5==
===Meaning===
[[Alpha radiation]] consists of [[alpha particles]] emitted by certain [[radioactive]] materials, each composed of two [[proton]]s and two [[neutron]]s.
===About Alpha Radiation===
[[Alpha particles]] are [[helium]] [[nucleus|nuclei]].
They can be stopped by a sheet of paper or human skin.
Poses a health risk if alpha-emitting substances are inhaled or ingested.
===Examples===
[[Polonium]]-210 emits [[alpha particles]] and is highly [[toxic]] if ingested.
[[Alpha radiation]] is used in some types of smoke detectors.