Advertisements
Advertisements
प्रश्न
What is half-life of nucleus? Give the expression.
उत्तर
The half-life T1/2 is defined as the time required for the number of atoms initially present to reduce to one-half of the initial amount.
T1/2 = `("In" 2)/lambda = 0.6931/lambda`
APPEARS IN
संबंधित प्रश्न
It has been found that the Sun’s mass loss is 4.34 × 109 kg per second. How much energy per second would be radiated into space by the Sun?
The half-life period of radioactive element A is the same as the mean life time of another radioactive element B. Initially both have the same number of atoms. Then
In alpha decay, why the unstable nucleus emits \[\ce{^4_2He}\] nucleus? Why it does not emit four separate nucleons?
Define curie.
Discuss the alpha decay process with example.
Discuss the gamma decay process with an example.
On your birthday, you measure the activity of the sample 210Bi which has a half-life of 5.01 days. The initial activity that you measure is 1µCi.
- What is the approximate activity of the sample on your next birthday? Calculate
- the decay constant
- the mean life
- initial number of atoms.
If T is the half-life of radioactive material, then the fraction that would remain after a time `"T"/2` is:
The radio active decay of uranium into thorium is expressed by the 92U238 `->` 90Th234 + x where x is
What percentage of original radioactive substance is left after 5 half-life time.
