Chapter 31 – Nuclei
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The half-life of a radioactive substance is 30 minutes, The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is.
22
Aug
The half-life of a radioactive substance is 30 minutes, The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is. The half-life of a radioactive substance is 30 minutes The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is. August 22, 2020 [...]
The rate of radioactive disintegration at an instant for a radioactive sample of half life 2.2 x 10^9 s is 10^10 s-1. The number of radioactive atoms in that sample at that instant is
22
Aug
The rate of radioactive disintegration at an instant for a radioactive sample of half life 2.2 x 10^9 s is 10^10 s-1. The number of radioactive atoms in that sample at that instant is The rate of radioactive disintegration at an instant for a radioactive sample of half life 2.2 x 10^9 s is 10^10 [...]
The nuclei of which one of the following pairs of nuclei are isotones ?
22
Aug
The nuclei of which one of the following pairs of nuclei are isotones ? The nuclei of which one of the following pairs of nuclei are isotones ? August 22, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
The binding energy of deuteron is 2.2MeV and that of He is 28 MeV. If two deuterons are fused to form one He then the energy released is:
22
Aug
The binding energy of deuteron is 2.2MeV and that of He is 28 MeV. If two deuterons are fused to form one He then the energy released is: The binding energy of deuteron is 2.2MeV and that of He is 28 MeV. If two deuterons are fused to form one He then the energy released [...]
In a radioactive material the activity at time t1 is R1 and at a later time t2, it is R2. If the decay constant of the material is λ, then
22
Aug
In a radioactive material the activity at time t1 is R1 and at a later time t2, it is R2. If the decay constant of the material is λ, then In a radioactive material the activity at time t1 is R1 and at a later time t2 it is R2. If the decay constant of [...]
In radioactive decay process, the negatively changed emitted β−particle are
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Aug
In radioactive decay process, the negatively changed emitted β−particle are In radioactive decay process the negatively changed emitted β−particle are August 22, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
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
22
Aug
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
22
Aug
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 [...]
The number of beta particles emitter by radioactive substance is twice the number of alpha particles emitter by it. The resulting daughter is an
22
Aug
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.
22
Aug
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 [...]