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marshall27 [118]
4 years ago
15

Radioactive isotopes are often introduced into the body through the bloodstream. their spread through the body can then be monit

ored by detecting the appearance of radiation in different organs. one such tracer is 131i, a β− emitter with a half-life of 8.0
d. suppose a scientist introduces a sample with an activity of 345 bq and watches it spread to the organs.
Biology
1 answer:
german4 years ago
4 0

Answer:

We are asked for the decay rate (which means the same as activity) after 24 days. The half life is 8 days. After 8 days the activity is halved: A = 425/2 = 212.5Bq ;)

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5 0
3 years ago
Explain why is important for hydrogen bonds to be weak bonds instead of very strong bonds.
lesantik [10]

Hydrogen bonds are classified as weak because they are formed fast, but they also break easily under normal biological conditions.


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4 0
3 years ago
How many phosphate minerals most affected human activity
goldenfox [79]

Answer:

How much phosphorus does the human body have?

How much phosphorus do I need?

Life Stage Recommended Amount

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Explanation:

3 0
2 years ago
What determines retention factor (Rf) ?
riadik2000 [5.3K]

Answer:

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Explanation:

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5 0
3 years ago
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natali 33 [55]

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3 0
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