Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively
Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively. If initially they have the same number…
7 years ago
Physics
In a radioactive decay process, the negatively charged emitted β- particles are
In a radioactive decay process, the negatively charged emitted β- particles are Options (a) the electrons produced as a result…
7 years ago
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? Options (a) ₃₄Se⁷⁴,₃₁Ga⁷¹ (b) ₃₈Sr⁸⁴,₃₈Sr⁸⁶ (c) ₄₂Mo⁹²,₄₀Zr⁹²…
7 years ago
The half life of radium is about 1600 year. Of 100 gram of radium existing now
The half life of radium is about 1600 year. Of 100 gram of radium existing now, 25g will remain unchanged…
7 years ago
In the reaction ₉₂U²³⁴→₈₇Y²²², how many α-particle and β-particles are emitted
In the reaction ₉₂U²³⁴→₈₇Y²²², how many α-particle and β-particles are emitted respectively? Options (a) 3,5 (b) 5,3 (c) 3,3 (d)…
7 years ago
which of the following can not be emitted by radioactive substances during their decay?
which of the following can not be emitted by radioactive substances during their decay? Options (a) Electrons (b) Protons (c)…
7 years ago
A nucleus with mass number 220 initially at rest emits an α-particle. If the Q-value
A nucleus with mass number 220 initially at rest emits an α-particle. If the Q-value of the reaction is 5.5…
7 years ago
A nucleus of mass number 220, initially at rest, emits an α-particle. If the Q-value
A nucleus of mass number 220, initially at rest, emits an α-particle. If the Q-value of the reaction is 5.5…
7 years ago
Which of the following atoms has the lowest ionisation potential?
Which of the following atoms has the lowest ionisation potential? Options (a) ₈O¹⁶ (b) ₇N¹⁴ (c) ₅₅Cs¹³³ (d) ₁₈Ar⁴⁰ Correct…
7 years ago
In which of the following systems will the radius of the first orbit (n=1) be minimum?
In which of the following systems will the radius of the first orbit (n=1) be minimum? Options (a) Single ionised…
7 years ago