Advertisements
Advertisements
प्रश्न
Define the activity of a given radioactive substance. Write its S.I. unit.
Advertisements
उत्तर
The total decay rate of a radioactive sample is called the activity of the sample. The S.I. unit of activity is Becquerel (Bq).
APPEARS IN
संबंधित प्रश्न
How is the mean life of a given radioactive nucleus related to the decay constant?
Why is it found experimentally difficult to detect neutrinos in nuclear β-decay?
The radioactive isotope D decays according to the sequence
If the mass number and atomic number of D2 are 176 and 71 respectively, what is (i) the mass number (ii) atomic number of D?
Consider the situation of the previous problem. Suppose the production of the radioactive isotope starts at t = 0. Find the number of active nuclei at time t.
Define one Becquerel.
After 1 hour, `(1/8)^"th"` of the initial mass of a certain radioactive isotope remains undecayed. The half-life of the isotopes is ______.
Two electrons are ejected in opposite directions from radioactive atoms in a sample of radioactive material. Let c denote the speed of light. Each electron has a speed of 0.67 c as measured by an observer in the laboratory. Their relative velocity is given by ______.
When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom ______.
Consider a radioactive nucleus A which decays to a stable nucleus C through the following sequence:
A→B→C
Here B is an intermediate nuclei which is also radioactive. Considering that there are N0 atoms of A initially, plot the graph showing the variation of number of atoms of A and B versus time.
A piece of wood from the ruins of an ancient building was found to have a 14C activity of 12 disintegrations per minute per gram of its carbon content. The 14C activity of the living wood is 16 disintegrations per minute per gram. How long ago did the tree, from which the wooden sample came, die? Given half-life of 14C is 5760 years.
