Radon-222 has a half- life of 3.8 days. ...

Radon-222 has a half- life of 3.8 days. If one starts with 0.064 kg of Radon-222. the quantitiy of Radon-222 left after 19 days will be

`0.002 kg`

`0.062 kg`

`0.032 kg`

`0.024 kg`

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Radon-222 has a half-life of 3.8 days. If one starts with 0.064 kg of Radon-222 the quantity of Radon-222 left after 19 days will be - (A) 0.002 kg. (B) 0.062 kg. (C) 0.032 kg. (D) 0.024 kg.

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