Radioactive radium has a half-life of approximately 1599 years. What percent of a given amount remains after 100 years?

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To determine what percent of a given amount of radioactive radium remains after 100 years, you can use the formula for exponential decay:

Amount remaining = Initial amount * (1/2)^(time/half-life)

In this case, the half-life of radioactive radium is approximately 1599 years. Therefore, the formula becomes:

Amount remaining = Initial amount * (1/2)^(100/1599)

Now, we can calculate the percentage of the given amount that remains after 100 years:

Percentage remaining = (Amount remaining / Initial amount) * 100

To get the final answer, you would need to substitute the appropriate values into the formulas and perform the calculations.