Atoms and Nucle...

₉₂U²³⁵ and ₉₂U²³⁸ differ as

At any instant, the ratio of the amount of radioactive substances is 2 : 1. If their half lives be respectively 12 and 16 hours, then after two days, what will be the ratio of the substances?

If half life of radioactive atom is 2 : 3 days, then its decay constant would be

A nucleus _nX^m α and one β particle. The resulting nucleus is

An artificial radioactive decay series begins with unstable ₉₄Pu²⁴¹. The stable nuclide obtained after eight α-decays and five β-decays is

The wavelength of radiation emitted is λ₀ when an electron jumps from the third to second orbit of hydrogen atom. For the electron jump from the fourth to the second orbit of the hydrogen atom, the wavelength of radiation emitted will be

In the nuclear reaction ₆C¹¹ → ₅B¹¹ + β⁺ + X, what does X stands for?

In the following nuclear reaction ₆C¹¹ + ₅B¹¹ + β⁺ + X, what does X stands for

Two radioactive materials X₁ and X ₂ have decay constants 10λ and λ respectively. If initially, they have the same number of nuclei, then the ratio of the number of nuclei of X₁ to that of X₂ will be 1/e after a time

Imagine an atom made up of proton and a hypothetical particle of double the mass of electron, but having the same charge as that of electron. Apply the Bohr atom model and consider all possible transitions of this hypothetical particle to the first excited level. The longest wavelength photon that will be emitted has wavelength constant R for hydrogen atom) equal to