IGCSE
Physics Notes: The Danger from Radon Gas
Radon is a radioactive gas
given off by certain rocks. Unlike most radioactive materials it can
be breathed in because it is a gas, and it produces the most
dangerous type of radiation if ingested or inhaled – alpha
radiation. Alpha radiation can damage cells and cause cancer. Radon
inhalation is believed to be the second most common cause of lung
cancer after smoking, causing about 5% of lung cancers.
Alpha radiation can build up
in closed spaces and unventilated buildings. Some parts of the the
United Kingdom are more prone to high radon concentration than others
– Devon and Cornwall especially. This is shown in the 'radon map'
of the UK below.
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