Nuclear Test - ...

What percentage of the mass of an atom is concentrated in the nucleus?

In the mass number range A = 30 to 170, the binding energy per nucleon is

Plutonium decays with a half-life of 24000 years. If the plutonium is stored for 72000 years, then the fraction of plutonium that remains is    

In a nuclear reaction which of the following is conserved

Cadmium rods are used in a nuclear reactor for

In what units is mass measured on the atomic scale?

Energies associated with nuclear processes are

B²¹⁰has a half life of 5 days. The time taken for seven-eighth of a sample to decay is

If 10% of a substance decays in 10 days, then approximate percentage of substance left after 24 days is

Choose the WRONG statement. A thermonuclear fusion reactor is better than a fission reactor for the following reason:

A free neutron decays into

The disintegration energy is

A radioactive substance has a half life of four months. Three fourths of the substance will decay in

At a given time there are 25% undecayed nuclei in a sample. After 10 seconds number of undecayed nuclei reduces to 12.5%. Then mean life of the nuclei will be about

Which of the following particles can be added to the nucleus of an atom without changing its chemical properties?

Relation between atomic number (Z), neutron number (N) and mass number (A) is

α-rays are

The half life of radon is 3.8 days. After how many days will only one twentieth of a radon sample be left over?

90% of a radioactive sample is left undisintegrated after time τ has elapsed, what percentage of initial sample will decay in a total time 2τ?

The average number of neutrons released by the fission of one uranium atom is

The nuclei of isotopes of a given element contain the same number of

β -rays and γ-rays are respectively

Nuclear fusion is possible

What is the main source of energy of the sun?

All nuclides with same mass number A are called

When a hydrogen bomb explodes, which of the following is used?

The half-life T_1/2of a radionuclide is

A radioactive material decays by simultaneous emission of two particles with respective half lives 1620 and 810 years. The time in years, after which one fourth of the material remains is

The chemical behavior of an atom depends upon

Nuclear mass M is found to be