The Half-Life of Radon-222 Is 3

question 24

Multiple Choice

The half-life of radon-222 is 3.83 d.If a sample of radon initially contains 6.00 × 10⁸ radon atoms,how many of them are left after 10.0 d?

• A)9.82 × 10⁷
• B)7.67 × 10⁷
• C)8.34 × 10⁸
• D)7.29 × 10⁸
• E)8.56 × 10⁸

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Definitions:

Total Reserves

The sum of all deposits, including cash, bank deposits, and investable assets, held by a financial institution or country.

Required Reserves

The minimum amount of reserves a bank must hold, as mandated by regulatory bodies, based on a percentage of the bank's deposit liabilities.

Money Supply

The total quantity of money available in the economy at a given time, including currency, deposits, and other liquid assets.

Required Reserve Ratio

The proportion of deposits that banks are required to hold in reserve and not lend out.