The half-life of Iodine-is 8 days. What does this mean?
The lifespan of Iodine-131 is 8 days
Iodine-131 takes 8 days to become a radioactive material
Iodine-131 takes 8 days to decay to half the amount of its original amount
Iodine-131 takes days to become a non-radioactive material
Q.2.
A sample of Radium-decays fromto 12.5g. How many half lives did it experience?
1
2
3
4
Q.3.
The process of nuclear change in an atom of radioactive material is called...
nuclear decay
nuclear mass
isotopes
radon
Q.4.
"A random and spontaneous process where an unstable nucleus emits radioactive radiation until the nucleus becomes more stable.."The statement above refer to...
Half -life
Nuclei decay
Radioactivity
Radioactive decay
Q.5.
Why can't carbon-dating be used on dinosaur remains?
The remains of living creatures cannot be accurately dated with carbon-14
The carbon-14 isotope did not exist during the age of the dinosaurs.
Dinosaurs were reptiles who had no carbon-14 in their systems.
Carbon dating is only accurate to 60,000 years ago-- well after the age of the dinosaurs.
Q.6.
Carbon dating relies on
the fact that all living things contain a small amount of carbon-14
organisms dying
washing your hands
organism remaining constant
Q.7.
The time it takes for a radioactivity level to drop by a half is is the sample's ___________________.
quarter life
whole life
wonderful life
half life
Q.8.
Ifmg of iodineis given to a patient, how much is left after 8 days? The half-life of iodine-is 8 days.
5.0mg
1.25g
10g
10mg
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