Question

210Po is very toxic and ingesting as little as 90 ng is enough to give you a lethal dose. Alexander Litvinenko was a Russian KGB agent who defected to the British secret service MI6. It is believed that Litvinenko was poisoned using 210Po in 2006. iii. How many $^{210}Po$ atoms are there in a 90 ng sample of pure $^{210}Po$? Recall that there are 6.022 x $10^{23}$ atoms in 210 g of $^{210}Po$. iv. What is the activity of the 90 ng sample of pure $^{210}Po$? v. By what fraction will the activity of the sample have decreased after 300 days? vi. What is the ratio of $^{210}Po$ : $^{206}Pb$ atoms in the sample after 300 days?

          210Po is very toxic and ingesting as little as 90 ng is enough to give you a lethal dose. Alexander Litvinenko was a Russian KGB agent who defected to the British secret service MI6. It is believed that Litvinenko was poisoned using 210Po in 2006.
iii. How many $^{210}Po$ atoms are there in a 90 ng sample of pure $^{210}Po$? Recall that there are 6.022 x $10^{23}$ atoms in 210 g of $^{210}Po$.
iv. What is the activity of the 90 ng sample of pure $^{210}Po$?
v. By what fraction will the activity of the sample have decreased after 300 days?
vi. What is the ratio of $^{210}Po$ : $^{206}Pb$ atoms in the sample after 300 days?

$210Po is very toxic and ingesting as little as 90 ng is enough to give you a lethal dose. Alexander Litvinenko was a Russian KGB agent who defected to the British secret service MI6. It is believed that Litvinenko was poisoned using 210Po in 2006. iii. How many ^210Po atoms are there in a 90 ng sample of pure ^210Po? Recall that there are 6.022 x 10^23 atoms in 210 g of ^210Po. iv. What is the activity of the 90 ng sample of pure ^210Po? v. By what fraction will the activity of the sample have decreased after 300 days? vi. What is the ratio of ^210Po : ^206Pb atoms in the sample after 300 days?$

Added by Kenneth M.

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