-
Home
- College physics
- Radioactivity and nuclear physics
- Nuclear decay and conservation
Problems&Exercises
In the following eight problems, write the complete decay equation for the given nuclide in the complete
notation. Refer to the periodic table for values of
.
decay of
(tritium), a manufactured isotope of hydrogen used in some digital watch displays, and manufactured primarily for use in hydrogen bombs.
Got questions? Get instant answers now!
decay of
, a naturally occurring rare isotope of potassium responsible for some of our exposure to background radiation.
Got questions? Get instant answers now!
decay of
.
Got questions? Get instant answers now!
Electron capture by
.
Got questions? Get instant answers now!
decay of
, the isotope of polonium in the decay series of
that was discovered by the Curies. A favorite isotope in physics labs, since it has a short half-life and decays to a stable nuclide.
Got questions? Get instant answers now!
decay of
, another isotope in the decay series of
, first recognized as a new element by the Curies. Poses special problems because its daughter is a radioactive noble gas.
Got questions? Get instant answers now!
In the following four problems, identify the parent nuclide and write the complete decay equation in the
notation. Refer to the periodic table for values of
.
decay producing
. The parent nuclide is a major waste product of reactors and has chemistry similar to potassium and sodium, resulting in its concentration in your cells if ingested.
Got questions? Get instant answers now!
decay producing
. The parent nuclide is a major waste product of reactors and has chemistry similar to calcium, so that it is concentrated in bones if ingested (
is also radioactive.)
Got questions? Get instant answers now!
decay producing
. The parent nuclide is nearly 100% of the natural element and is found in gas lantern mantles and in metal alloys used in jets (
is also radioactive).
Got questions? Get instant answers now!
decay producing
. The parent nuclide is in the decay series produced by
, the only naturally occurring isotope of thorium.
Got questions? Get instant answers now!
When an electron and positron annihilate, both their masses are destroyed, creating two equal energy photons to preserve momentum. (a) Confirm that the annihilation equation
conserves charge, electron family number, and total number of nucleons. To do this, identify the values of each before and after the annihilation. (b) Find the energy of each
ray, assuming the electron and positron are initially nearly at rest. (c) Explain why the two
rays travel in exactly opposite directions if the center of mass of the electron-positron system is initially at rest.
(a)
(b) 0.511 MeV
(c) The two
rays must travel in exactly opposite directions in order to conserve momentum, since initially there is zero momentum if the center of mass is initially at rest.
Got questions? Get instant answers now!
Confirm that charge, electron family number, and the total number of nucleons are all conserved by the rule for
decay given in the equation
. To do this, identify the values of each before and after the decay.
Got questions? Get instant answers now!
Confirm that charge, electron family number, and the total number of nucleons are all conserved by the rule for
decay given in the equation
. To do this, identify the values of each before and after the decay.
Got questions? Get instant answers now!
Confirm that charge, electron family number, and the total number of nucleons are all conserved by the rule for
decay given in the equation
. To do this, identify the values of each before and after the decay.
Got questions? Get instant answers now!
Confirm that charge, electron family number, and the total number of nucleons are all conserved by the rule for electron capture given in the equation
. To do this, identify the values of each before and after the capture.
Got questions? Get instant answers now!
A rare decay mode has been observed in which
emits a
nucleus. (a) The decay equation is
. Identify the nuclide
. (b) Find the energy emitted in the decay. The mass of
is 222.015353 u.
Got questions? Get instant answers now!
(a) Write the complete
decay equation for
.
(b) Find the energy released in the decay.
(a)
(b) 4.87 MeV
Got questions? Get instant answers now!
(a) Write the complete
decay equation for the neutron. (b) Find the energy released in the decay.
(a)
(b) ) 0.783 MeV
Got questions? Get instant answers now!
(a) Write the complete
decay equation for
, a major waste product of nuclear reactors. (b) Find the energy released in the decay.
Got questions? Get instant answers now!
Calculate the energy released in the
decay of
, the equation for which is given in the text. The masses of
and
are 21.994434 and 21.991383 u, respectively.
Got questions? Get instant answers now!
(a) Write the complete
decay equation for
.
(b) Calculate the energy released in the decay. The masses of
and
are 11.011433 and 11.009305 u, respectively.
Got questions? Get instant answers now!
(a) Calculate the energy released in the
decay of
.
(b) What fraction of the mass of a single
is destroyed in the decay? The mass of
is 234.043593 u.
(c) Although the fractional mass loss is large for a single nucleus, it is difficult to observe for an entire macroscopic sample of uranium. Why is this?
(a) 4.274 MeV
(b)
(c) Since U-238 is a slowly decaying substance, only a very small number of nuclei decay on human timescales; therefore, although those nuclei that decay lose a noticeable fraction of their mass, the change in the total mass of the sample is not detectable for a macroscopic sample.
Got questions? Get instant answers now!
(a) Write the complete reaction equation for electron capture by
.
(b) Calculate the energy released.
(a)
(b) 2.754 MeV
Got questions? Get instant answers now!
Questions & Answers
A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what are the types of wave
Maurice
fine, how about you?
Mohammed
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
Who can show me the full solution in this problem?
Got questions? Join the online conversation and get instant answers!
Source:
OpenStax, College physics. OpenStax CNX. Jul 27, 2015 Download for free at http://legacy.cnx.org/content/col11406/1.9
Google Play and the Google Play logo are trademarks of Google Inc.