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zzz [600]
3 years ago
7

Which of the following is the best definition of half-life for a radioactive substance?

Chemistry
2 answers:
svet-max [94.6K]3 years ago
7 0
<span>The temperature
The total amount of the substance
The addition of a catalyst ~</span>
algol [13]3 years ago
3 0

This is an incomplete question, here is a complete question.

Which of the following is the best definition of half-life for a radioactive substance?

A. Half of the amount of time required for all of the radioactive atoms to decay.

B. The amount of time required for half of the radioactive atoms to decay.

C. The amount of time required for each radioactive atom to decay halfway.

D. All of the above.

Answer : The correct option is, (B) The amount of time required for half of the radioactive atoms to decay.

Explanation:

Half life : It is defined as the amount of time taken by a radioactive material to decay to half of its original value.

All radioactive decays follow first order kinetics.

The relation between the half-life and rate constant is:

k=\frac{0.693}{t_{1/2}}

The half-life of the radioactive isotope is remains the same that means a constant value and it is not affected by any external conditions.

Hence, the correct option is, (B)

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7 0
3 years ago
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ololo11 [35]
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3 0
3 years ago
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How are Parkinson's disease and ALS similar?
Diano4ka-milaya [45]

Answer:

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Explanation:

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Scientists don't know the exact cause of these diseases. As the cause is not known, there is no exact way to prevent them. There is no cure for them, either. The treatment is focused on the management of symptoms.

This is why the third option is the correct one.

4 0
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Explanation:

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