0 a chemical element that is a radioactive gas formed when radium decays and found naturally in rock and soil:
1 a colorless radioactive gas that is formed when radium (= a chemical element) and some other substances break down
The radon concentration is predicted in normal environmental conditions.
We have always lived in a tough, dynamic neighbourhood-rats, radon, retrovirus-and we always will.
A short chapter on applied geology includes mineral, energy and water resources, geotechnical considerations (= engineering geology) and natural radon emissions.
Discrepancies between measured and predicted values of radon indicate likely seismic activity.
The serious problem of radon in caves gets only passing mention.
For most people, radon presents a more serious risk than all other natural sources of radioactivity put together.
It is as if people believe that their homes are impregnable to radon gas because they cannot see or hear it.
These invitations will ensure that every household in the most radon-affected parts of the country will have been offered a free radon measurement.
中文繁体
氡(鐳衰變時形成的一種氣體放射性元素,在大自然中存在於岩石和土壤中)…
More中文简体
氡(镭衰减时形成的一种放射性元素,发现自然存在于岩石和土壤中)…
MorePortuguês
radônio, rádon…
MorePolski
radon…
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