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
Solar energy is due to
Fusion reaction
Fission reaction
Combustion reaction
Chemical reaction
In a given reaction:
Radioactive radiations are emitted in the sequence of
α, β, γ
γ, β, α
γ, α, β
β, α, γ
The average binding energy of a nucleon inside an atomic nucleus is about
8 MeV
8 eV
8 J
8 erg
The half-life of radium is 1600 yr. The fraction of a sample of radium that would remain after 6400 yr is
1/4
1/2
1/8
1/16
The nucleus 48Cd115, after two successive β-decay will give
46Pa115
49In114
<p><sub>50</sub>Sn<sup>113</sup></p>
<p><sub>50</sub>Sn<sup>115</sup></p>
A radioactive sample with a half-life of 1 month has the label: ‘Activity = 2 microcurie on 1 – 8 – 1991’. What would be its activity two months earlier?
1.0 microcurie
0.5 microcurie
8 microcurie
The mass density of a nucleus varies with mass number A as
A2
A
Constant
1/A
What is the radius of iodine atom? (atomic No.53, Mass No.126)
2.5 × 10-11 m
2.5 × 10-9 m
7 × 10-9 m
7 × 10-6 m