A nucleus ruptures into two nuclear parts, which have their velocity ratio equal to 2 :1. What will be the ratio of their nuclear size (nuclear radius)?
21/3 : 1
1 : 21/3
31/2 : 1
1 : 31/2
A free neutrons decays into a proton, an electron and
a beta particle
an alpha particle
an antineutrino
an neutrino
The stable nucleus that has a radius half that of Fe56 is
Li7
Na21
S16
Ca40
The mass number of He is 4 and that for sulphur is 32. The radius of sulphur nuclei is larger than that of helium by
√8
4
2
8
Which of the following is used as a moderator in nuclear reactors?
Plutonium
Cadmium
Heavy water
Uranium
A radioactive element has half-life period 800 yr. After 6400 yr what amount will remain?
1/2
1/16
1/8
1/256
Energy released in the fission of a single 92U235 nucleus is 200 MeV. The fission rate of a 92U235 filled reactor operating at a power level of 5 W is
1.56 x 10-10 s-1
1.56 x 1011 s-1
1.56 x 10-16 s-1
1.56 x 10-17 s-1
In a given reaction
ZXA → Z+1YA → Z-1KA-4 → Z-1KA-4
Radioactive radiations are emitted in the sequence of
α, β, γ
γ, α, β
β, α, γ
γ, β, α
The energy equivalent of one atomic mass unit is
1.6 x 10-19 J
6.02 x 1023 J
931 MeV
9.31 MeV
What is the radius of iodine atom? (Atomic No.53, Mass No. 126)
2.5 x 10-11 m
2.5 x 10-9 m
7 x 10-9 m
7 x 10-6 m
