Advertisements
Advertisements
Question
Advertisements
Solution
The substance's rate of decay and the type of radiation it emits are unaffected by any physical or chemical changes, including variations in temperature and pressure, extreme heating, freezing, the effect of strong electric and magnetic fields, chemical treatment, oxidation, etc.
This demonstrates unequivocally that the orbital electrons, which are susceptible to such alterations, cannot be the cause of the radioactive event. Thus, the nucleus should be the source of radioactivity. The phenomenon of radioactivity is thus nuclear.
RELATED QUESTIONS
What do you mean by Atomic mass
What happens to the mass number of an element when (i) an α -particle, (ii) a β -particle, and (iii) γ -radiation is emitted?
Draw a diagram of a simple atom showing the nucleus and electrons. In this atom:
(a) What type of charge will there be on the nucleus?
(b) What is the value of this charge?
A radioactive nuclide `""_86^226` Ra decays by emission of two alpha particles, one beta particle and gamma rays. Which of the following is the resulting nuclide X?
Explain the use of radioactive in the field of medicine, agriculture and industry.
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
State three common properties of beta rays and cathode rays.
Two radioactive nuclei are represented by xAp and yAq and when p and q are mass numbers and x, y are the atomic number. How can the products be represented, i .e., what are the new values of p, q. x and y after the emission of an α-particle and a β-particle from A and B respectively.
It is advised not to touch a radioactive substance by hand. Give reason.
A radioctive sample decays `7/8` times its original quantity in 15 minutes. The half-life of the sample is ______.
