Atomic and Nuclear PhysicsEveryday Science
Protons, electrons and neutrons are collectively referred to as:
nucleons
deutrons
atoms
positrons
nucleons
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Vitamin C is soluble inA. fat
B. water
C. ethers
D. phenols
The half-life of a radioactive element is 10 minutes. If the initial count rate is 368 counts per minute, then the time for which count rate reaches 46 counts per minute would be?
A. 30 minutes
B. 40 minutes
C. 15 minutes
D. 23 minutes
A compound containing some amount of radioisotope is
A. tracer
B. radioactive compound
C. non radioactive
D. linear active compound
The density of air in the atmosphere is
A. uniform
B. not uniform
C. zero
D. none of above
Ashes from a fire in the forest show carbon-14 activity of only 1/8 the activity of fresh wood. How long ago the forest had fire?
A. 18590 years
B. 17190 years
C. 16580 years
D. 14820 years
Most of the nuclei with atomic number 1 to 82 are
A. positive nuclei
B. negative nuclei
C. unstable nuclei
D. stable nuclei
In the body, the weight of blood is about
A. 1/12th of body
B. 1/5th of body
C. 1/8th of body
D. 1/4th of body
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