Definition of radon in English:

radon

noun ˈreɪdɒnˈreɪˌdɑn

mass noun

The chemical element of atomic number 86, a rare radioactive gas belonging to the noble gas series.
（化学元素）氡（符号： Rn ）
Radon is a product of the radioactive decay of radium and is used as a source of alpha particles in radiotherapy. Small quantities of the gas are also emitted naturally from the ground in granite-rich areas
Example sentencesExamples
- All the areas had previously been thought to be safe from high levels of seeping radon, which comes out of the ground and gathers in enclosed spaces.
- That is roughly half the annual dose from inhaled radon and its decay products in a typical single family home in the United States.
- A review of over 11 studies in uranium miners attributed an observed increase in lung cancer to radon and its progeny and not to uranium.
- The ground in some parts of the country releases radon, a radioactive gas that can cause cancer.
- As the pressure in a building is slightly lower than the pressure outdoors, radon will be drawn from the ground into the building.

Origin

Early 20th century: from radium, on the pattern of argon.

Definition of radon in US English:

radon

nounˈrāˌdänˈreɪˌdɑn

The chemical element of atomic number 86, a rare radioactive gas belonging to the noble gas series.
（化学元素）氡（符号： Rn ）
Radon is a product of the radioactive decay of radium and is used as a source of alpha particles in radiotherapy. Small quantities of the gas are also emitted naturally from the ground in granite-rich areas
Example sentencesExamples
- All the areas had previously been thought to be safe from high levels of seeping radon, which comes out of the ground and gathers in enclosed spaces.
- The ground in some parts of the country releases radon, a radioactive gas that can cause cancer.
- A review of over 11 studies in uranium miners attributed an observed increase in lung cancer to radon and its progeny and not to uranium.
- As the pressure in a building is slightly lower than the pressure outdoors, radon will be drawn from the ground into the building.
- That is roughly half the annual dose from inhaled radon and its decay products in a typical single family home in the United States.

Origin

Early 20th century: from radium, on the pattern of argon.

词汇	radon
释义	Definition of radon in English: radon noun ˈreɪdɒnˈreɪˌdɑn mass noun The chemical element of atomic number 86, a rare radioactive gas belonging to the noble gas series. （化学元素）氡（符号： Rn ） Radon is a product of the radioactive decay of radium and is used as a source of alpha particles in radiotherapy. Small quantities of the gas are also emitted naturally from the ground in granite-rich areas Example sentencesExamples All the areas had previously been thought to be safe from high levels of seeping radon, which comes out of the ground and gathers in enclosed spaces. That is roughly half the annual dose from inhaled radon and its decay products in a typical single family home in the United States. A review of over 11 studies in uranium miners attributed an observed increase in lung cancer to radon and its progeny and not to uranium. The ground in some parts of the country releases radon, a radioactive gas that can cause cancer. As the pressure in a building is slightly lower than the pressure outdoors, radon will be drawn from the ground into the building. Origin Early 20th century: from radium, on the pattern of argon. Definition of radon in US English: radon nounˈrāˌdänˈreɪˌdɑn The chemical element of atomic number 86, a rare radioactive gas belonging to the noble gas series. （化学元素）氡（符号： Rn ） Radon is a product of the radioactive decay of radium and is used as a source of alpha particles in radiotherapy. Small quantities of the gas are also emitted naturally from the ground in granite-rich areas Example sentencesExamples All the areas had previously been thought to be safe from high levels of seeping radon, which comes out of the ground and gathers in enclosed spaces. The ground in some parts of the country releases radon, a radioactive gas that can cause cancer. A review of over 11 studies in uranium miners attributed an observed increase in lung cancer to radon and its progeny and not to uranium. As the pressure in a building is slightly lower than the pressure outdoors, radon will be drawn from the ground into the building. That is roughly half the annual dose from inhaled radon and its decay products in a typical single family home in the United States. Origin Early 20th century: from radium, on the pattern of argon.
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