The half-life of silicon-32 is 710 years. If 70 grams is present now, how much will be present in 200 years? (Round your answer to three decimal places.)

The amount that will be present in 200 years is 57.584 g

We'll begin by calculating the number of half-lives that has elapsed.

Half-life (t½) = 710 years

Time (t) = 200 years

n = t / t½

n = 200 / 710

Number of half-lives (n) = 20/71

Initial amount (N₀) = 70 g

Thus, the amount remaining after 200 years is 57.584 g

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grams

Explanation:

Given -

Half life of the silicon-32 years

Half life means the time period required by a radioactive element to reduce its mass by half.

Radioactive decay formula is

Where

A represents the amount of radioactive element after time t years

represents the initial amount of radioactive element

time of decay

half-life of the substance

Substituting the given values in above equation, we get -

grams

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

b - the respond is innate and varies over time.

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