Radon `(Ra)` decays into Polonium `(P_0)` by emitting an `alpha-`particle with half-life of `4` days. A sample contains `6.4 xx 10^10` atoms of `R_n`. After `12` days, the number of atoms of `R_n` left in the sample will be

Radon (Ra) decays into Polonium (P_0) by emitting an alpha- particle with half-life of 4 days. A sample contains 6.4 xx 10^10 atoms of R_a . After 12 days, the number of atoms of R_a left in the sample will be

A sample has 4 xx 10^16 radioactive nuclei of half-life 10 days. The number of atoms decaying in 30 days is.

Half life of Bi^(210) is 5 days. If we start with 50,000 atoms of this isotope, the number of atoms left over after 10 days is

The half-life of a sample of a radioactive substance is 1 hour. If 8 xx 10^10 atoms are present at t = 0 , then the number of atoms decayed in the duration t = 2 hour to t = 4 hour will be

The half-life of a sample of a radioactive substance is 1 hour. If 8 xx 10^10 atoms are present at t = 0 , then the number of atoms decayed in the duration t = 2 hour to t = 4 hour will be

A certain nuclide has a half life of 30 minutes. If the sample containing 26xx10^(10) atoms us allowed ti decay for 90 minutes, how many atoms will remain ?

A certain nucleide has half life period of 30 min. If a sample containing 6xx10^(10) atoms is allowed to decay for 90 min, how many atoms will remain ?

Radon, ._(86)^(222)Rn , is a radioactive gas that can be trapped in the basement of homes, and its presence in high concnetrations is a known health hazard. Radon has a half-life of 3.83 days . A gas sample contains 4.0 xx 10^(8) radon atoms initially. (a) How many atoms will remain after 12 days have passed if no more radon leaks in? (b) What is the initial activity of the radon sample?

Radon, ._(86)^(222)Rn , is a radioactive gas that can be trapped in the basement of homes, and its presence in high concnetrations is a known health hazard. Radon has a half-life of 3.83 days . A gas sample contains 4.0 xx 10^(8) radon atoms initially. (a) How many atoms will remain after 12 days have passed if no more radon leaks in? (b) What is the initial activity of the radon sample?