In the nucleus of 11Na23, the number of protons, neutrons and electrons are
11, 12, 0
23, 12, 11
12, 11, 0
23, 11, 12
Curie is a unit of
energy of gamma rays
half - life
radioactivity
intensity of gamma rays
If the binding energy per nucleon in 3Li7 and 2He4 nuclei are respectively 5.60 MeV and 7.06 MeV, then the energy of proton in the reaction 3Li7+ p → 2 2He4 is
19.6 MeV
2.4 MeV
8.4 MeV
17.3 MeV
The mass density of a nucleus varies with mass number A as
A2
A
constant
1/A
In a fission reaction
the binding energy per nucleon of X and Y is 8.5 MeV whereas of 236U is 7.6 MeV. The total energy liberate will be about
2000 MeV
200 MeV
2 MeV
1 KeV
In a given reaction:
Radioactive radiations are emitted in the sequence of
α, β, γ
γ, β, α
γ, α, β
β, α, γ
Which of the following are suitable for the fusion process?
Light nuclei
Heavy nuclei
Elements lying in the middle of periodic table
Elements lying in the middle of binding energy curve
The binding energy per nucleon is maximum in case of
2He4
26Fe56
56Ba141
92U235
The nuclei 6C13 and 7N14 can be described as
isotones
isobars
isotopes of carbon
isotopes of nitrogen
A radioactive element has half-life period 800 yr. After 6400 yr what amount will remain?
1/2
1/16
1/8
1/256
