15 Questions
Which type of nuclear transformation involves the emission of a positron?
Beta decay
Which element has two isotopes with 75.4% abundance of one and 24.6% abundance of the other?
Chlorine
What is the unit used to measure the number of atoms that decay per unit time?
Becquerel (Bq)
What is the activity of one gram of pure radium?
1 Ci
What is the old unit of activity used to measure the activity of one gram of pure radium?
Curie (Ci)
Which unit is a sub-multiple of Curie commonly used to measure activity?
Kilobecquerel (kBq)
Which equation represents the radioactivity of the sample as the number of radionuclides remaining without disintegration at any time?
A(t) = λN(t)
What does the decay constant (λ) represent in the context of radioactive decay?
The rate at which unstable nuclei decay spontaneously and randomly
What does the term 'specific activity (SA)' represent in the context of radioactivity?
The activity per unit mass
What is the relationship between the half-life (t½) and the mean or average life (Ƭ)?
t½ = 0.693 / λ and Ƭ = 1/ λ
What does the half-life (t½) represent in the context of radioactive decay?
The time required to decrease the activity of any radionuclide to one-half of its initial value
What is the difference between N(t) and A(t) in the context of radioactive decay?
N(t) represents the number of radionuclides remaining without disintegration at any time, while A(t) represents the activity per unit mass
What does the mean or average life (Ƭ) represent in the context of radioactive decay?
The summation of the lifetimes of the individual atoms divided by the total number of atoms originally present
What is true about specific activity (SA)?
It is inversely proportional to t½ and directly proportional to atomic weight
"Unstable nuclei decay spontaneously and randomly". Which parameter directly represents this statement?
(λ)
Test your knowledge of radioactivity and nuclear transformation with this quiz. Explore the spontaneous nuclear decay of unstable elements and the emission of alpha, beta, positron, neutron, and proton particles, often accompanied by gamma radiation. Learn about isotopes and their role in radioactivity.
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