Table of Contents
- 1 How do you calculate the half-life of a radioactive substance?
- 2 What is the formula for calculating half-life?
- 3 What is the half-life of a radioactive substance if 75\% of any given amount of the substance disintegrates in 40 minutes?
- 4 Which statement about the half-life of a source is correct?
- 5 What is the half-life of a radioactive substance if 75\% of its given amount disintegrates in 60 min?
- 6 How long will it take for 75\% of the atoms of a certain radioactive element originally present to disintegrate the half-life of the element is 10 days?
- 7 What is a half-life in chemistry?
- 8 How does half-life work in chemistry?
How do you calculate the half-life of a radioactive substance?
The time taken for half of the original population of radioactive atoms to decay is called the half-life. This relationship between half-life, the time period, t1/2, and the decay constant λ is given by t12=0.693λ t 1 2 = 0.693 λ .
What is the formula for calculating half-life?
The half-life of a reaction is the time required for the reactant concentration to decrease to one-half its initial value. The half-life of a first-order reaction is a constant that is related to the rate constant for the reaction: t1/2 = 0.693/k.
What is the half-life of a radioactive substance if 75\% of any given amount of the substance?
Solution: 75\% of the substance disintegrates in two half lives. ∴ t1/2=15min.
What is the half-life of a radioactive substance if 75\% of any given amount of the substance disintegrates in 40 minutes?
Hence, the half-life of the substance is 13 min 20 sec.
Which statement about the half-life of a source is correct?
Which statement about the half-life of a source is correct?
| A | It is half the time for the radioactive source to become safe |
|---|---|
| B | It is half the time it takes for an atom to decay |
| C | It is half the time it takes the activity of the source to decrease to zero |
What is the half-life of uranium 234?
about 25 thousand years
The half-life of uranium-238 is about 4.5 billion years, uranium-235 about 700 million years, and uranium-234 about 25 thousand years.
What is the half-life of a radioactive substance if 75\% of its given amount disintegrates in 60 min?
half life of a radioactive substance which disintegrates by 75\% in 60 minutes will be. 75\% of the substance disintegrates into two half lives. ∴ 2 half – lives = 60 min ∴t1/2=30 min.
How long will it take for 75\% of the atoms of a certain radioactive element originally present to disintegrate the half-life of the element is 10 days?
Complete step by step answer: Therefore, the time required by the element to disintegrate is 4.15 days and option (D) is correct.
What is the half-life of a compound if 75 percent of a given sample of the compound decomposes in 60 minutes?
So to multiply by t half equal to 60 minutes, Antifa from here will be called to 30 minutes. No. So therefore the half life period off the compound is 30 minute.
What is a half-life in chemistry?
half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive …
How does half-life work in chemistry?
The half-life of a radioactive isotope is the amount of time it takes for one-half of the radioactive isotope to decay. It has a half-life of 12.3 y. After 12.3 y, half of the sample will have decayed to 3He by emitting a beta particle, so that only 50.0 g of the original 3H remains.