Nuclei Test - 6...

Atomic mass of $$_ { 26 } \mathrm { F } { \mathrm { e } } \text { is } 55.9349 \mathrm { u }$$ and that of $$H \text { is } 1.00783 u$$.Mass of neutron is $$1.00867 \mathrm { u }$$ and $$\mathrm { 1u } = 931 \mathrm { MeV } / \mathrm { c } ^ { 2 }$$ then binding energy of $$_{ 26 }^{ 56 }{ { F }_{ e } }$$ is

Calculate the binding energy per nucleon of $$_ { 17 } ^ { 35 } \mathrm { C } \ell$$ nucleus. Given that mass of $$_ { 17 } ^ { 35 } \mathrm { C } \ell$$ nucleus $$= 34.98000 \mathrm { u } ,$$ mass of proton $$= 1.007825 \mathrm { u } ,$$ mass of neutron $$= 1.008665 \mathrm { u }$$ and 1$$\mathrm { u }$$ is equivalent to 931$$\mathrm { Mev. }$$

Binding energy per nucleon of deutron in 1.112 MeV and binding energy per nucleon of a $$\alpha$$-particle is 7.07 MeV, then in following process, energy Q is :-  $$2(1_H^2)\rightarrow _2He^4+ Q $$

After 300 days, the activity of a radioactive sample is 5000 dps( disintegration per second).The activity becomes 2500 dps after another 150 dys.The initial activity of the sample (in dps) is

Human life expectancy is of the order of 

The above is a plot of binding energy per nucleon $$E _ { b }$$ , against the nuclear mass $$\mathrm { M } ; \mathrm { A } , \mathrm { B } , \mathrm { C } , \mathrm { D } , \mathrm { E } , \mathrm { F }$$ correspond to different nuclei. Consider four reactions:
where $$\varepsilon$$ is the energy released? In which reactions is $$\varepsilon$$ positive?

In a hydrogen atom, the binding energy of the electron in the nth state is $$E _ { n }$$ ,  then the frequency of revoulation the electron in the nth orbit is

If $$\begin{matrix} a \\ b \end{matrix}X$$ emits firstly a position, then two $$\alpha$$ and two $$\beta$$ in the last $$\alpha$$ is emitted and finally it converts to $$\begin{matrix} c \\ d \end{matrix}Y$$. The correct relation is

A radioactive element $$X$$ converts into another stable element $$Y .$$ Half-life of $$X$$ is 2$$h$$ . Initially,only $$X$$ is present. After time $$t$$ , the ratio of atoms of $$X$$ and $$Y$$ is found to be $$1 : 4 .$$ Then $$t$$ inhours is 

From the following equations pick out the possible nuclear fusion reactions