A. Progressively increases
B. Progressively decreases
C. Remains constant throughout
D. May increase or decrease depending on the material
Related Mcqs:
- β-rays emission in radioactive disintegration is always accompanied by the emission of____________________?
A. γ-rays
B. α-rays
C. Neutrons
D. None of these - The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to ______________ gm?
A. 1/4
B. 1/8
C. 1/2
D. 1/16 - Which of the following may be used to measure the rate of nuclear disintegration ?
A. Geiger-Muller Counter
B. Cyclotron
C. Cold chamber
D. Mass spectrograph - 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 - 75% of a radioactive element decays in 6 hours. Its half life period is ______________ hours?
A. 3/4
B. 1/6
C. 3
D. 4 - The atomic number of a radioactive element is not changed, when it emits _____________ rays?
A. α
B. β
C. γ
D. α & β - 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 - 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 - The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element ?
A. A + Z
B. A – Z
C. A
D. Z
