Chapter 30 – Atoms

Two radioactive substances A and B have decay constants 5 λ and λ respectively. At t=0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1/e)^2 after a time interval Radioactive material 'A' has decay constant '8λ' and material 'B' has decay constant [...]

Two radioactive materials X1​ and X2​ have decay constants 5 λ and λ, respectively. If initially they have the same number of nuclei, the ratio of the number of nuclei of X1​ to that of X2​ will be 1/e after a time respectively. If initially they have the same number of nuclei the ratio of [...]

In the nuclear decay given below, the particles emitted in the sequence are In the nuclear decay given below the particles emitted in the sequence are August 22, 2020 Category: Chapter 30 - Atoms , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,

The number of beta particles emitter by radioactive substance is twice the number of alpha particles emitter by it. The resulting daughter is an The number of beta particles emitter by radioactive substance is twice the number of alpha particles emitter by it. The resulting daughter is an August 22, 2020 Category: Chapter 30 - [...]

For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is. For a radioactive material half-life is 10 minutes. If initially there are 600 number of nuclei the time taken (in minutes) for the disintegration of 450 nuclei [...]

Radioactive material ‘A’ has decay constant ‘8λ’ and material ‘B’ has decay constant ‘λ’. Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material ‘B’ to that ‘A’ will be 1/e? Radioactive material 'A' has decay constant '8λ' and material 'B' has decay constant 'λ'. Initially they [...]

The radius of first permitted bohr Orbit for the electron in a hydrogen atom equals 0.51 angstrom and its ground state energy equals -13.6 electron volt. If the electron in the hydrogen atom is replaced by Muon then the first bohr radius and ground state energy will be ​ The total energy of the electron [...]

The total energy of an electron in the first excited state of the hydrogen atom is about −3.4 eV. Its Kinetic energy in this state The total energy of an electron in the first excited state of the hydrogen atom is about −3.4 eV. Its Kinetic energy in this state August 21, 2020 Category: Chapter [...]

Ionization potential of hydrogen atom is 13.6V. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV. The spectral lines emitted by hydrogen atoms according to Bohr’s theory will be The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. The kinetic [...]

The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. The kinetic energy of an electron in the first excited state is The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. The kinetic energy of an electron in the first [...]