Natural Uranium, as found on earth, consists of two isotopes in the ratio of ^ 235 U/ ^ 238 U=0.07 Assuming that these two isotopes existed in equal amounts at the time the earth was formed; calculate the age of the earth. [note: life times: ^ 238 U=6.52*10^ 9 years , ^ 235 U=1.02*10^ 9 years]
Radioactive decay
The emission of energy to produce ionizing radiation is known as radioactive decay. Alpha, beta particles, and gamma rays are examples of ionizing radiation that could be released. Radioactive decay happens in radionuclides, which are imbalanced atoms. This periodic table's elements come in a variety of shapes and sizes. Several of these kinds are stable like nitrogen-14, hydrogen-2, and potassium-40, whereas others are not like uranium-238. In nature, one of the most stable phases of an element is usually the most prevalent. Every element, meanwhile, has an unstable state. Unstable variants are radioactive and release ionizing radiation. Certain elements, including uranium, have no stable forms and are constantly radioactive. Radionuclides are elements that release ionizing radiation.
Artificial Radioactivity
The radioactivity can be simply referred to as particle emission from nuclei due to the nuclear instability. There are different types of radiation such as alpha, beta and gamma radiation. Along with these there are different types of decay as well.
Q4 Natural Uranium, as found on earth, consists of two isotopes in the ratio of ^ 235 U/ ^ 238 U=0.07 Assuming that these two isotopes existed in equal amounts at the time the earth was formed; calculate the age of the earth. [note: life times: ^ 238 U=6.52*10^ 9 years , ^ 235 U=1.02*10^ 9 years]
![1)
1. What is the half-life of this
radioactive sample?
Aptray tw
2. What is the decay constant of this
isotope?
3. How many atoms were initially
present in this sample?
4. What will be the activity of this
sample after 10.0 minutes?
5. How long will it take for the activity of this sample to drop to 1.0 % of its initial value?
2)
A equal twice the number of nuclei of B. The lifetime of the two nuclides are t for A, and 3T
for B. Calculate the time (in units of T) at which the number of nuclei of A and B are equal.
Two radioactive nuclides, A and B, are presented at t=0 with the number of nuclei of
3)
according to your study to the shell model, answer the following
1- Explain why the 3D-harmonic oscillator potential does not give the correct magic numbers?
2- Discuss how spin-orbit coupling helps to find the correct magic number?
3- Write the ground state configuration of protons and neutrons for "F, S and 55Mn?
4- Find the total spin and the parity for "F, "S and Mn
23U/-3*U = 0.07. Assuming that these two isotopes existed in equal amounts at the time the
earth was formed; calculate the age of the earth. [note : life times: 25U 6.52 x 10 years,
235U
4)
)Natural Uranium, as found on earth, consists of two isotopes in the ratio of
1.02 x 10' years]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F106d3cbe-b6d1-4ef9-bfce-dffd4e5483b6%2F92b22c5d-87f7-495b-ac92-5897976c7b8b%2Fmpiaoni_processed.jpeg&w=3840&q=75)
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