U. To. Pb. ?
Choose the correct option in which the ionization power of alpha(α), beta(β) and gamma(γ) particles is arranged correctly.
α > β < γ
γ < β < α
α < β < γ
γ > β, and α = 0
What are baryons and leptons?How are they both conserved?
- An atomic electron is ejected
- An electron which is already present within the nucleus is ejected
- A neutron in the nucleus decays emitting an electron
- A proton in the nucleus decays emitting an electron
What Is Lagrangian And Hamiltonian?
The Radioactivity of an element when it undergoes a chemical change to form a chemical compound
Increases or decreases depending on the radioelement
Neither Increases or decreases
Which of the following radiation is most dangerous because of its high penetrating power and high energy?
none of these
(i) A + B → C + E (ii) C → A + B + E
(iii) D + E → F + E (iv) F → D + E + E
Where ε is the energy released? In which reactions is ε positive?
- (i) and (iv)
- (ii) and (iv)
- (ii) and (iii)
- (i) and (iii)
They have very high kinetic energy.
They have a smaller rate of collision with the atoms (or molecules) of the medium.
They possess more mass than an alpha particle.
They have less ionizing power but more penetrating power.
19 8O→19 9F+e−+¯v.
These may look like long calculations; use the unit amu or u for the masses, and c2=931MeVu, and it will become much simpler.
Atomic masses:19 8O:19.003576 u; 19 9F:18.998403 u.
- 2.021 MeV
- 3.754 MeV
- 4.816 MeV
- 5.165 MeV
The kinetic energy after an alpha decay is mainly carried by the alpha particle.
A radioactive element decays as follows:
aPb - 2α → cQd → eRf + -1e0
The relation between a, b, e, & f is
i) f = d = b-8 and ii) e = c = a -4
i) f = d = b-8 and ii) e = c +1 = a -3
i) f = d+2 = b-8 and ii) e = c +1 = a -3
i) f = d-8 = b and ii) e = c +1 = a -4
i) f = d = b-4 and ii) e = c +1 = a -3
23994Pu → 23592U + 42He
The atomic masses of the elements are as follows:
- mPu=239.0522 a.m.u.
- mU=235.044 a.m.u.
- mHe=4.0026 a.m.u.
- 6.74 MeV
- 5.22 MeV
- 10.44 MeV
- 2.61 MeV