147567 Consider a radioactive isotope ${ }_{92} \mathrm{U}^{238}$ decays ${ }_{82} \mathrm{U}^{206}$ into in a series by emission of $n_{\alpha}$ number of alpha particles and $n_{\beta}$ number of beta particles. Then the values of $\mathbf{n}_{\alpha}$ and $\mathbf{n}_{\boldsymbol{\beta}}$ ?

147573 The half-life of a radioactive sample is 20 days this means that

147576 A sample of a radioactive element with initial mass of $32 \mathrm{~g}$ decayed to $\mathbf{4} \mathrm{g}$ in $\mathbf{4 2}$ minutes. How much of the original sample remained after first 14 minutes?

147578 A radioactive nucleus emits $4 \alpha$ particles and $7 \beta$ particles in succession. The ratio of number of neutrons to that of protons is $[A=$ mass number, $Z=$ atomic number]

147567 Consider a radioactive isotope ${ }_{92} \mathrm{U}^{238}$ decays ${ }_{82} \mathrm{U}^{206}$ into in a series by emission of $n_{\alpha}$ number of alpha particles and $n_{\beta}$ number of beta particles. Then the values of $\mathbf{n}_{\alpha}$ and $\mathbf{n}_{\boldsymbol{\beta}}$ ?

147573 The half-life of a radioactive sample is 20 days this means that

147576 A sample of a radioactive element with initial mass of $32 \mathrm{~g}$ decayed to $\mathbf{4} \mathrm{g}$ in $\mathbf{4 2}$ minutes. How much of the original sample remained after first 14 minutes?

147578 A radioactive nucleus emits $4 \alpha$ particles and $7 \beta$ particles in succession. The ratio of number of neutrons to that of protons is $[A=$ mass number, $Z=$ atomic number]

147567 Consider a radioactive isotope ${ }_{92} \mathrm{U}^{238}$ decays ${ }_{82} \mathrm{U}^{206}$ into in a series by emission of $n_{\alpha}$ number of alpha particles and $n_{\beta}$ number of beta particles. Then the values of $\mathbf{n}_{\alpha}$ and $\mathbf{n}_{\boldsymbol{\beta}}$ ?

147573 The half-life of a radioactive sample is 20 days this means that

147576 A sample of a radioactive element with initial mass of $32 \mathrm{~g}$ decayed to $\mathbf{4} \mathrm{g}$ in $\mathbf{4 2}$ minutes. How much of the original sample remained after first 14 minutes?

147578 A radioactive nucleus emits $4 \alpha$ particles and $7 \beta$ particles in succession. The ratio of number of neutrons to that of protons is $[A=$ mass number, $Z=$ atomic number]

147567 Consider a radioactive isotope ${ }_{92} \mathrm{U}^{238}$ decays ${ }_{82} \mathrm{U}^{206}$ into in a series by emission of $n_{\alpha}$ number of alpha particles and $n_{\beta}$ number of beta particles. Then the values of $\mathbf{n}_{\alpha}$ and $\mathbf{n}_{\boldsymbol{\beta}}$ ?

147573 The half-life of a radioactive sample is 20 days this means that

147576 A sample of a radioactive element with initial mass of $32 \mathrm{~g}$ decayed to $\mathbf{4} \mathrm{g}$ in $\mathbf{4 2}$ minutes. How much of the original sample remained after first 14 minutes?

147578 A radioactive nucleus emits $4 \alpha$ particles and $7 \beta$ particles in succession. The ratio of number of neutrons to that of protons is $[A=$ mass number, $Z=$ atomic number]