Question

An element has an atomic mass 135.887u. This element is unstable and decays by alpha decay,...

An element has an atomic mass 135.887u. This element is unstable and decays by alpha decay, (α), with a half-life of 6.7days. The alpha particle is emitted with a kinetic energy of 2.8MeV. Determine the fraction present after 49.8hrs.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Carbon-14 is unstable and decays to a differentnucleus(known as the daughter nucleusof the decay) along with...
Carbon-14 is unstable and decays to a differentnucleus(known as the daughter nucleusof the decay) along with an electron and an antineutrino (a particle with zero charge and virtually zero mass). The energy released in this decay (known as the Q-value) is found to be Q = 0.156476 MeV. Find the atomic number, the mass number, and the chemical symbol for the daughter nucleus of this decay. What is the mass of the daughter nucleus (in u)? [Hint: First find the...
Beryllium-8 is an unstable isotope and decays into two α particles, which are helium nuclei with...
Beryllium-8 is an unstable isotope and decays into two α particles, which are helium nuclei with mass 6.68×10−27kg. This decay process releases 1.5×10−14J of energy. For this problem, let's assume that the mass of the Beryllium-8 nucleus is just twice the mass of an α particle and that all the energy released in the decay becomes kinetic energy of the α particles. Part A If a Beryllium-8 nucleus is at rest when it decays, what is the speed of the  α...
Beryllium-8 is an unstable isotope and decays into two α particles, which are helium nuclei with...
Beryllium-8 is an unstable isotope and decays into two α particles, which are helium nuclei with mass 6.68×10−27kg. This decay process releases 1.5×10−14J of energy. For this problem, let's assume that the mass of the Beryllium-8 nucleus is just twice the mass of an α particle and that all the energy released in the decay becomes kinetic energy of the α particles. If a Beryllium-8 nucleus is at rest when it decays, what is the speed of the α particles...
In the form of radioactive decay known as alpha decay, an unstable nucleus emits a helium-atom...
In the form of radioactive decay known as alpha decay, an unstable nucleus emits a helium-atom nucleus, which is called an alpha particle. An alpha particle contains two protons and two neutrons, thus having mass m=4u and charge q=2e. Suppose a uranium nucleus with 92 protons decays into thorium, with 90 protons, and an alpha particle. The alpha particle is initially moving at velocity= 5.89 *10^8, and the radius of alpha particle is r=3.1* 10^ -11.What is the speed of...
You have just discovered a new radioactive element! You find that it first undergoes an alpha...
You have just discovered a new radioactive element! You find that it first undergoes an alpha decay followed by a beta decay. During the alpha decay Q1 energy is released, and during the beta decay Q2 energy is released. Find an expression for the mass of the final product after these two decays in terms of the released energies, the mass of the parent nucleus, and the decay products. For your physical representation you should draw diagrams of the particles...
Uranium (U) has a mass number of 238 and an atomic number of 92 and decays...
Uranium (U) has a mass number of 238 and an atomic number of 92 and decays by emission of an alpha particle. The product of this decay is (Points : 5) A.) uranium (U), with a mass number of 234 and an atomic number of 92. B.) lead (Pb), with a mass number of 234 and an atomic number of 91. C.) thorium (Th), with a mass number of 234 and an atomic number of 90. D.) radium (Ra), with...
Plutonium-239 has a half-life of 24,000 years and an atomic mass of 239.05 u. When it...
Plutonium-239 has a half-life of 24,000 years and an atomic mass of 239.05 u. When it decays to Uranium-235 an alpha particle with an energy of 5.2 MeV is released. a. How many atoms of are there in one tonne of the materia b. After 48,000 years how many atoms of are there left? c. How much energy in Joules has been released in the radioactive decays of the plutonium
222 86Radon decays to 218 84Polonium with a half-life of 3.8 days. Calculate the kinetic energy...
222 86Radon decays to 218 84Polonium with a half-life of 3.8 days. Calculate the kinetic energy (in MeV) of the alpha particle that is released in this decay.
large radioactive atoms often decay by alpha particle emission. the alpha particle is emitted at a...
large radioactive atoms often decay by alpha particle emission. the alpha particle is emitted at a speed of 1.5 * 10^4 km/s. given that an alpha particle is a helium-4 nucleus, what is the kinetic energy of the emitted alpha particle?
An isotope of radium (22488Ra) undergoes alpha decay. Use the information below to determine the deBroglie...
An isotope of radium (22488Ra) undergoes alpha decay. Use the information below to determine the deBroglie wavelength of the emitted alpha particle. Atomic mass 22488Ra: 224.020187 u malpha: 4.0026 u (6.646 x 10-27 kg) Atomic number Element Mass number Atomic mass (u) 90 Thorium (Th) 228 228.028716 226 225.905364 88 Radium (Ra) 220 220.043941 86 Radon (Rn) 222 222.017571 220 220.011369
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT