Chapter 30 Misconceptual
What has the greater mass?
A neutron and a proton that are far from each other (unbound).
Uranium-238 decays to lead-206 through a series of...
Combination of alpha, beta, and gamma decays
98 43 Tc has a half life of 4.2 x 10^6 years. 90 38 Sr has a half life of 28.79 years. Which statements are true?
Decay constant of Sr is greater than the decay constant of Tc
After three half-lives, what fraction of the original radioactive material is left?
1/8
A material having which decay constant would have the shortest half-life?
10^9/day
Carbon dating is useful only for determining the age of objects less than...
60,000 years old
A sample's half-life is 1 day. What fraction of the original sample will have decayed after 3 days?
7/8
If the half life of a radioactive sample is 10 years then it should take ____ years for the sample to decay completely....
Cannot be determined
Which of the following will generally create a more stable nucleus?
Having a larger binding energy per nucleon
Radon has a half life of 1600 years. The earth is several billion years old, so why do we still find radon on this planet
Heavier unstable isotope decay into it
A nucleus has...
Less energy than its component neutrons and protons
As a radioactive sample decays....
None of the above
How does an atom's nucleus stay together?
None of the above
Elements in the periodic table are distinguished by...
Protons in the nucleus
There are 82 protons in a lead nucleus. Why doesn't the lead nucleus burst apart?
The strong nuclear forces holds the nucleus together
The half life of a radioactive nucleus is...
Time it takes for half the substance to decay