A. α-ray
B. Proton
C. Position
D. β-ray
Related Mcqs:
- The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then____________?
A. 3/4th of it will disintegrate in two months
B. It will completely disintegrate in two months
C. It will completely disintegrate in four months
D. 1/8th of it will remain intact at the end of four months - Emission of β-particles during radioactive decay of a substance is from__________________?
A. Innermost shell
B. Nucleus
C. Outermost shell
D. None of these - Which of the following types of nuclear reactors is most prone to radioactive hazards ?
A. Pressurised water reactor
B. Gas cooled reactor
C. Molten sodium cooled reactor
D. Boiling water reactor - The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be ______________ of its original weight?
A. 1/2
B. 1/4
C. 1/8
D. 1/16 - The atomic number of a radioactive element is not changed, when it emits _____________ rays?
A. α
B. β
C. γ
D. α & β - Radioactive decay is a _____________ change?
A. Chemical
B. Nuclear
C. Physical
D. None of these - The half life period of a radioactive element depends on its _______________________?
A. Temperature
B. Pressure
C. Amount
D. None of these - The half life period of a radioactive element depends upon the___________________?
A. Temperature
B. Pressure
C. Amount of element present
D. None of these - Artificially produced radioactive isotopes are used for____________________?
A. Power generation
B. Treatment of certain diseases
C. Initiating nuclear fission and fusion
D. All A., B. and C. - The new nucleus formed after β-decay of a radioactive element has___________________?
A. Less atomic number
B. Less atomic weight
C. More atomic number
D. More atomic weight
