7. How many types of nuclear processes can produce energy? 8. How many types of radioactive...
7. How many types of nuclear processes can produce energy? 8. How many types of radioactive nuclides that can be introduced into organisms and traced for diagnostic purposes? 9. What is a half life? 10. What is the t1/2 of uranium?
Homework Answers
7) a) nuclear fission : the process where huge heavily weighed nuclei break into stable components releasing energy
b) nuclear fission : the process where nuclei fuse together to form stable elements due to having poor n/p ratio.
c) alpha decay
d) beta decay
c) gamma decay
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7. How many types of nuclear processes can produce energy? 8.
How many types of radioactive...
Nuclear reactions can produce a great deal of energy. What is the source of this energy?
1. Define a buffer. 2. Nuclear reactions can produce a great deal of energy. What is the source of this energy? 3. Radon-221 can undergo two types of radioactive decay In a typical sample of radom-221, 22% decays to francium221, while the other 78% decays to polonium-217. Classify the reactions as α, β or positron emission . 4. What are the two rules for balancing a nuclear equation? 6. Sodium-24 emits both B and y radiation. What is the appropriate shielding be for someone...
a radioactive material has a half life of 7 days. how many radioactive isotopes are left...
a
radioactive material has a half life of 7 days. how many
radioactive isotopes are left after 33 hours, if you had 7000000
isotopes in the beginning?
Question 33 1 pts A radioactive material has a half life of 7 days. How many radioactive isotopes are left after 33 hours, if you had 7 000 000 isotopes in the beginning? Use 2 sig figs in your answer. < Previous Next >
Answer the followings: (Nuclear energy, total points 20) What are different types of nuclear reactions there?0)1)2...
Answer the followings: (Nuclear energy, total points 20) What are different types of nuclear reactions there?0)1)2 )3 a. b. Typical purity uranium in nuclear fuel pellet is () 15% (l) 25. (w c. Typical purity uranium in nuclear bomb is ( ) 100% (ii) 20%( d. In nuclear reaction electron/proton/neutron hit the e. A nuclear power plant has name plate capacity of 1 there? (i, 1 (92 01) 3 (W) 4 fv) 5 (point 1) nucleus of an atom? (Point...
Topic 7.1 – Discrete energy and radioactivity
The energy level diagram for a hydrogen atom is shown. The following questions are about the energylevels of the hydrogen atom. An electron jumps from the n = 5 level to the n = 1 level.1. Will this result in an emission line, or an absorption line in thespectrum of this atom? 1. _________________2. Which excited state did the electron start at?2. _________________3. What is the principal quantum number of the electron when it isat the level n = 1?...
Nuclear physics Radioactive isotopes are often introduced into the body through the bloodstream. Their spread through...
Nuclear physics Radioactive isotopes are often introduced into the body through the bloodstream. Their spread through the body can then be monitored by detecting the appearance of radiation in different organs. 1311, a B- emitter with a half-life of 8.0 days is one such tracer. Suppose a scientist introduces a sample with an activity of 375 Bq and watches it spread to the organs. Assuming that the sample all went to the thyroid gland, what will be the decay rate...
do you need any extra information? a component of nuclear fallout from atmospheric tests of nuclear bombs, falls t...
do
you need any extra information?
a component of nuclear fallout from atmospheric tests of nuclear bombs, falls to the ground 90, and crops. When ingested, it can replace calcium in cow's and mother's milk and can be into the bones of developing young animals and children. Strontium-90 decays by beta to yttrium-90 with a half-life of 29 years. (The energy release accompanying this beta decay can s a dust on grass gger leukemia in the bone marrow and other...
Modeling radioactive decay in pennies MODELING RADIOACTIVE DECAY WITH PENNIES ADVANCED STUDY ASSIGNMENT MODEL 2: RADIONUCLIDE...
Modeling radioactive decay in pennies
MODELING RADIOACTIVE DECAY WITH PENNIES ADVANCED STUDY ASSIGNMENT MODEL 2: RADIONUCLIDE HALF-LIFE The time required for half of a sample of a radionuclides (radioactive isotopes) to decay is called the half-life (units of time). Table 2 below illustrates the half-lives of several radioisotopes and the Table 2: Half-lives of some Radioisoto barium-131 carbon-14 chromium-51 cobalt-60 iodine-131 uranium-238 Radiation Half-life 11.6 days 5730 yrs 27.8 days 5.3 yrs 8.1 days 4.47. 109 yr Application detection of...
8. A 135 lb person absorbs 3.3 x10-7 J of energy from radioactive emissions. a. How...
8. A 135 lb person absorbs 3.3 x10-7 J of energy from radioactive emissions. a. How many rads do they receive? b. How many grays do they receive?
9) When aluminum-27 is bombarded with a neutron, a gamma ray is emitted. What radioactive isotope...
9) When aluminum-27 is bombarded with a neutron, a gamma ray is emitted. What radioactive isotope is produced? silicon-27 silicon-28 aluminum-28 magnesium-27 magnesium-28 10) Iodine-123, which is used for diagnostic imaging in the thyroid, has a half-life of 13 h. If 50.0 mg of I-123 were prepared at 8:00 A.M. on Monday, how many mg remain at 10:00 A.M. on the following day? 50.0 mg 25.0 mg 12.5 mg 6.25 mg 3.13 mg 11) Krypton-79 has a half-life of 35...
can you solve and show work Question 2 12 pts A radioactive isotope of cesium, 137Cs,...
can you solve and show work
Question 2 12 pts A radioactive isotope of cesium, 137Cs, which is common in spent nuclear fuel and in nuclear contamination, has a half-life of 27.58 years. If a nuclear accident spills 39.88 g of 137Cs into the environment, how many grams of 137Cs are left after 177.8 years? Hint: calculate k first.
a
radioactive material has a half life of 7 days. how many
radioactive isotopes are left after 33 hours, if you had 7000000
isotopes in the beginning?
Question 33 1 pts A radioactive material has a half life of 7 days. How many radioactive isotopes are left after 33 hours, if you had 7 000 000 isotopes in the beginning? Use 2 sig figs in your answer. < Previous Next >
Answer the followings: (Nuclear energy, total points 20) What are different types of nuclear reactions there?0)1)2 )3 a. b. Typical purity uranium in nuclear fuel pellet is () 15% (l) 25. (w c. Typical purity uranium in nuclear bomb is ( ) 100% (ii) 20%( d. In nuclear reaction electron/proton/neutron hit the e. A nuclear power plant has name plate capacity of 1 there? (i, 1 (92 01) 3 (W) 4 fv) 5 (point 1) nucleus of an atom? (Point...
Nuclear physics Radioactive isotopes are often introduced into the body through the bloodstream. Their spread through the body can then be monitored by detecting the appearance of radiation in different organs. 1311, a B- emitter with a half-life of 8.0 days is one such tracer. Suppose a scientist introduces a sample with an activity of 375 Bq and watches it spread to the organs. Assuming that the sample all went to the thyroid gland, what will be the decay rate...
do
you need any extra information?
a component of nuclear fallout from atmospheric tests of nuclear bombs, falls to the ground 90, and crops. When ingested, it can replace calcium in cow's and mother's milk and can be into the bones of developing young animals and children. Strontium-90 decays by beta to yttrium-90 with a half-life of 29 years. (The energy release accompanying this beta decay can s a dust on grass gger leukemia in the bone marrow and other...
Modeling radioactive decay in pennies
MODELING RADIOACTIVE DECAY WITH PENNIES ADVANCED STUDY ASSIGNMENT MODEL 2: RADIONUCLIDE HALF-LIFE The time required for half of a sample of a radionuclides (radioactive isotopes) to decay is called the half-life (units of time). Table 2 below illustrates the half-lives of several radioisotopes and the Table 2: Half-lives of some Radioisoto barium-131 carbon-14 chromium-51 cobalt-60 iodine-131 uranium-238 Radiation Half-life 11.6 days 5730 yrs 27.8 days 5.3 yrs 8.1 days 4.47. 109 yr Application detection of...
8. A 135 lb person absorbs 3.3 x10-7 J of energy from radioactive emissions. a. How many rads do they receive? b. How many grays do they receive?
9) When aluminum-27 is bombarded with a neutron, a gamma ray is emitted. What radioactive isotope is produced? silicon-27 silicon-28 aluminum-28 magnesium-27 magnesium-28 10) Iodine-123, which is used for diagnostic imaging in the thyroid, has a half-life of 13 h. If 50.0 mg of I-123 were prepared at 8:00 A.M. on Monday, how many mg remain at 10:00 A.M. on the following day? 50.0 mg 25.0 mg 12.5 mg 6.25 mg 3.13 mg 11) Krypton-79 has a half-life of 35...
can you solve and show work
Question 2 12 pts A radioactive isotope of cesium, 137Cs, which is common in spent nuclear fuel and in nuclear contamination, has a half-life of 27.58 years. If a nuclear accident spills 39.88 g of 137Cs into the environment, how many grams of 137Cs are left after 177.8 years? Hint: calculate k first.
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