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Resonance Effect

The half life...

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The half life of rdioactiv Po is 138.6 days .For 10 lakh Po atoms , the no. of decays in 24 hrs.is\::

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Q. Rn decays into Po by emitting an

α

particle with half life of 4 days. A sample contains

6.4 \times 10^{10}

atoms of Rn. After 12 days, the number of atoms of Rn left in the sample will be

_{84} {Po}^{210}

α

_{82}^{206} Pb

with a half life of 138.4 days. If 1.0 g of

P o^{210}

is placed in a closed tube, how much helium accumulate in 69.2 days at STP?

_{84}^{210}

α

_{82}^{206} P b

with a half-life of 138.4 days. If 1.0 g of

_{84}^{201} P o

is placed in a sealed tube how much of helium will accumulate in 69.2 days? Express the answer in

c c

_{84} P o^{210}

α

_{82} P b^{206}

with a half-life of

138.4

days. If 1 g of

_{84} P o^{210}

is placed in a sealed tube, the amount of helium(in

c m^{3}

) that will accumulate in

69.2

(Write the value to the nearest integer)

_{84} P o^{210}

(half-life= 138.4 days) undergoes

α

- decay to form

_{82} P b^{206}

_{84} P o^{210}

is placed in a sealed tube, what volume (in mL) of helium will accumulate in 69.2 days at STP?(take

\sqrt{2}

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