A radioactive substance emits n beta particles in the first 2 s and 0.5 n beta
A radioactive substance emits n beta particles in the first 2 s and 0.5 n beta particles in the next…
7 years ago
Radioactivity
A uranium nucleus ₉₂ U ²³⁸ emits an α-particle and a β-particle in succession.
A uranium nucleus ₉₂ U ²³⁸ emits an α-particle and a β-particle in succession. The atomic number and mass number…
7 years ago
A sample of radioactive element has a mass of 10 gram at an instant t=0.
A sample of radioactive element has a mass of 10 gram at an instant t=0. The approximate mass of this…
7 years ago
After 300 days, the activity of a radioactive sample is 5000 dps
After 300 days, the activity of a radioactive sample is 5000 dps (disintegration per second). The activity becomes 2500 dps…
7 years ago
A nucleus disintegrates into two nuclear parts which have their velocities in the ratio
A nucleus disintegrates into two nuclear parts which have their velocities in the ratio 2 : 1. The ratio of…
7 years ago
The half-life of a radioactive substance is 30 min. The time (in minutes) taken
The half-life of a radioactive substance is 30 min. The time (in minutes) taken between 40% decay and 85% decay…
7 years ago
A radioactive substance decays to 1/16th of its initial activity in 40 days.
A radioactive substance decays to 1/16th of its initial activity in 40 days. The half-life of the radioactive substance expressed…
7 years ago
If a nucleus ᴢXᴬ emits 9α and 5β-particles, then the ratio of total protons and neutrons
If a nucleus ᴢXᴬ emits 9α and 5β-particles, then the ratio of total protons and neutrons in the final nucleus…
7 years ago
The ionisation potential of hydrogen-atom is -13.6 eV. An electron in the groundstate
The ionisation potential of hydrogen-atom is -13.6 eV. An electron in the groundstate of a hydrogen-atom absorbs a photon of…
7 years ago
Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life
Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life of sample is…
7 years ago