Rate of radioactive disintegration depends upon
Amount of substance.
Oxidation state of the element
Maximum number of stable nuclides have
odd number of neutrons and odd number of protons
even number of neutrons and odd number of protons
even number of neutrons and even number of protons
odd number of neutrons and even number of protons.
Isotopes contain same number of
Protons as well as neutrons
The total mass of protons and neutrons of an isotope is not equal to the actual mass thenuclide.
This is because of
Attraction between electrons and the nucleus
None of these.
The relationship showing the interconversion of mass and energy was given by
Thermonuclear reactions are responsible for energy production
inside the stars
at the centre of the earth
in the modern spaceships.
The half-life period of radioactive material is 15minutes.
What percent of the material will remain after 45 minutes
The nucleus of a radioactive atom, which emits betarays, contains the following particles
Neutrons, protons and radioactive electrons.
neutrons and protons
Neutrons, protons and alpha particles
The half-life period of a radioactive substance is 20days.
How long will it take for 3/4 of the atoms originally present to disintegrate
Half life period of a radioactive substance is 10years.
The amount of the substance decayed after 40 years would be
Which of the following is used as neutron absorber in the nuclear reactor
Some compound of uranium.
A radioactive nuclide emits particles alpha, beta, gamma in successivedisintegration.
The atomic mass of the end product is less than the atomic mass of the original nuclide by approximately
A stable nuclide has, in general,
equal numbers of proton and neutrons.
even number of protons and even number of neutrons
odd number of protons and odd number of neutrons
odd number of protons and even number of electrons
When mass equal to 1amu.
Disappears, the energy produced is equal to nearly
The half-life period of a radioactive element is 140days.
After 560 days, one gram of the element will reduce to
The source of solar energy is
Combustion of hydrogen.
Which of the following is used as moderator in nuclear reactors
Group displacement law was given by
Soddy and Fajan.
If 2.0 g of a radioactive isotope has a half-life of 20 hr, the half-life of 0.5 g of the same substance is
Which of the following substances can be used in control rods used for controlling nuclear fission reaction
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