Ava-May Nelson

2021-03-07

Lodine - 131, a radioactive substance that is effective in localing brain tumors, a half-life of only eight days. A hospital purchased 22 grams of the substance but had to wail five days before it could be used. How much of the substance was left after five days?

Tuthornt

Skilled2021-03-08Added 107 answers

Data analysis

Given data,

Initial amount of substance

Half-life

Time period

Amount of substance left after 't' = ?

Solution

The decay of an radioactive substance is exponential.

And the amount of substance (P) left fter 't' days is given by,

Where lambda is decay constant.

Given

That is by 8 days, amount left will become half.

Now after 5 days, amount left,

Hence amount left after 5 days is 14.265 grams (rounded to 3 decimals)

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