$_{90}^{232}Th$ an isotope of thorium decays in ten stages emitting six  $\alpha$-particles and four $\beta$-particles in all. The end product of the decay is

  • A

    $_{82}^{206}Pb$

  • B

    $_{82}^{209}Pb$

  • C

    $_{82}^{208}Pb$

  • D

    $_{83}^{209}Br$

Similar Questions

A nucleus with $Z = 92$ emits the following in a sequence: $\alpha ,\,{\beta ^ - },\,{\beta ^ - },\,\alpha ,\alpha ,\alpha ,\alpha ,\alpha ,{\beta ^ - },\,{\beta ^ - },\alpha ,\,{\beta ^ + },\,{\beta ^ + },\,\alpha $. The $Z$ of the resulting nucleus is

  • [AIEEE 2003]

Which of the following is a correct statement

  • [IIT 1999]

A radioactive nucleus $_{92}{X^{235}}$decays to $_{91}{Y^{231}}$. Which of the following particles are emitted

The $\alpha$-particle is the nucleus of an atom of

Some laws/processes are given in Column $I$. Match these with the physical phenomena given in Column $II$ and indicate your answer by darkening appropriate bubbles in the $4 \times 4$ matrix given in the $ORS$.

Column $I$ Column $II$
$(A)$ Transition between two atomic energy levels $(p)$ Characteristic $X$-rays
$(B)$ Electron emission from a material $(q)$ Photoelectric effect
$(C)$ Mosley's law $(r)$ Hydrogen spectrum
$(D)$ Change of photon energy into kinetic energy of electrons $(s)$ $\beta$-decay

  • [IIT 2007]