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Radioactive Decay
Page 4
Questions (597)
What percentage of sodium-24 with a half life of 15.0 hr would remain after 60hours?
3 answers
asked by
Sarah
745 views
The half-life for radioactive decay of 14C is 5730 years (it emits β-particles with energy
of 0.16 MeV). An archaeological
4 answers
asked by
Zoa
1,553 views
The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced to a mass of 4 mg. What was
4 answers
asked by
<3
1,844 views
If you have 24 grams of an unstable atom with a half life of 5,000 years, how many grams would be left after 15,000 years?
3 answers
asked by
Clarissa
2,193 views
Radioactive decay is the process by which an unstable element transforms into different element, typically releasing energy as
5 answers
asked by
james
665 views
How do you find the half-life of an element? Please explain and show me how to do this. I know the answer is 14.3 days, but I
4 answers
asked by
Ryan
1,042 views
I’m which type of radioactive decay does the nucleus become more stable without changing its identity
Beta plus decay Gamma
2 answers
asked anonymously
50 views
a)indium-115 has a half life of 4.5 hours. if you start with a 12.0-mg sample of indium-115, how much will remain after 13.5
4 answers
asked by
amanda
3,473 views
1. Write balanced equations for each of the following processes.
a. Chromium- 51, which targets the spleen and is used as a
3 answers
asked by
Sharon
2,549 views
What can scientists learn from the rate at which radioactive elements decay?
A. a rock's absolute age* B. the relative age of
3 answers
asked by
Anonymous
964 views
The half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463×10^11 years longer. What is the
5 answers
asked by
Anonymus
209 views
Use this paragraph: The half-life of carbon-14 is 5,700 years. A certain sample of wood has 20 grams of carbon-14 when it is
11 answers
asked anonymously
340 views
Assume the half-life of a substance is 31 days and the initial amount is 172.799999999996 grams.When will the substance be
1 answer
asked by
Lexi
90 views
Assume the half-life of a substance is 31 days and the initial amount is 172.799999999996 grams.
(a) Fill in the right hand side
1 answer
asked by
Lexi
84 views
The half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463×1011 years longer. What is the
3 answers
asked by
answer this
61 views
Three difference between radioactive decay from chemical changes.
1 answer
asked by
Evans
94 views
An element decays with a half-life of 32 minutes. How long will it take a sample of 18,472 g to decay to 16g?
1 answer
asked by
Kristy
296 views
In a gamma decay process . . .
A) a high energy alpha particle is produced B) a parent nuclide was in an excited state C) a
1 answer
asked by
can i have help
340 views
If a sample contains 25 g or carbon-14 and 75 g of nitrogen-14, how many half-lives has it undergone
2 answers
asked by
Kevin
551 views
Yttrium-90 is an important radioactive isotope used by doctors for cancer treatment. The isotope undergoes beta decay with a
1 answer
asked by
Kenzie
242 views
OBronium-12 is a radioactive material that spontaneously decays when it comes in contact with oxygen. One minute after a 200-mg
3 answers
asked by
Derieri
277 views
The half-life of Carbon-14 is 5715 years. The Carbon-14 content of a piece of wood is that of new wood.
What is the age of the
1 answer
asked by
ellie
434 views
i dont understand this question:(
Study Figure 10-3. How much nitrogen-14 will be produced from a 200-g sample of carbon-14 after
2 answers
asked by
hipniblet
843 views
A radioactive isotope has a half life of 25 years. There was 100 mg of the isotope in 2005.
(a) Find an expression for the amount
2 answers
asked by
Emma Wallace
503 views
9. Assume you began with 10 g of a radioactive parent isotope. How many grams of parent isotope will be present in the same
4 answers
asked by
Christian ChimChim
1,284 views
Radioactive Carbon 14 (atomic number 6) is produced in the atmosphere when a neutron is absorbed by Nitrogen 14 (atomic number
1 answer
asked by
Jon
456 views
The isotope sodium-22 has a half life of 2.60 years. What is the 1st order rate constant in inverse years?
I am using the Ln
3 answers
asked by
Valerie
384 views
(a)-A fossilised tree was tested and contains 10 grams of Carbon-14. Given that there was 12 grams of Carbon-14 present when it
2 answers
asked by
Edmonds
704 views
(a)-A fossilised tree was tested and contains 10 grams of Carbon-14. Given that there was 12 grams of Carbon-14 present when it
2 answers
asked by
Gunner76
649 views
A radioactive element decays exponentially according to the function Q(t) = Q0ekt
.If 100 mg of the element decays to 25 mg in 12
3 answers
asked by
Rania
1,097 views
1. We start with 400 atoms of Uranium-238. How many remain after 4.5 billion years? _______ After 9 billion years? _______ After
2 answers
asked by
아, 깹송~
703 views
The half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463×10^11 years longer. What is the
3 answers
asked anonymously
278 views
sam is comparing the half-life of two isotopes of uranium. The half-life of uranium-238 is 4.5 × 10⁹ years. The half- life of
3 answers
asked by
Gelo
390 views
You have 5 grams of carbon-14; whose half-life is 5730 years.
a)Write the rule of the function that gives the amount of carbon-14
2 answers
asked by
Nicky
742 views
The process of radioactive decay is unpredictable and irreversible. Which option would be an appropriate model of the
3 answers
asked by
Sub-Zero
61 views
Sam is comparing the half-life of two isotopes of uranium. The half-life of Uranium-238 is 4.5 × 10° years. The half-life of
3 answers
asked by
:P
55 views
Sam is comparing the half-life of two isotopes of uranium. The half-life of Uranium-238 is 4.5 × 10° years. The half-life of
3 answers
asked by
:P
37 views
The half-life of Palladium-100 is 4 days. A lab is working with a sample of with 3250mg. Write a function, f(x), to represent
2 answers
asked by
Patsy
610 views
This exercise uses the radioactive decay model.
A wooden artifact from an ancient tomb contains 80% of the carbon-14 that is
2 answers
asked by
Melany
933 views
The carbon isotope 14C is used for carbon dating of objects. A 14C nucleus can change into a different kind of element, a
1 answer
asked by
Anonymous
725 views
If a radioactive nucleus alpha decays to yield a sodium24 nucleus in 14.8 hours, what was the identity of the original nucleus?
2 answers
asked by
Dani
688 views
Suppose that 10 grams of carbon ( 14C )is released in a nuclear energy plant accident. How long will it take for the 10 gramto
2 answers
asked by
Keem Graham
492 views
hich statement best describes the effect of radioactive decay on a nucleus? (point) The resulting nucleus is less stable than
3 answers
asked anonymously
49 views
Cobalt-60 has a half-life of about 5 years. How many grams of a 300 g sample will remain after 20 years?
(Points : 1)
3 answers
asked by
Anonymous
1,034 views
Show that if a radioactive substance has a half life of T, then the corresponding exponential decay function can be written as
2 answers
asked by
Adrianna
542 views
116In nuclei are produced at the rate of 10 s-1. Calculate the maximum number of 116In nuclei (number in equilibrium) in the
4 answers
asked by
Ali
332 views
the amount of carbon-14 in a mammoth's bone is 45% of the amount found in a living organism. How long ago did the mammoth die?
3 answers
asked by
kim
559 views
An artifact was found and tested for its carbon-14 content. If 71% of the original carbon-14 was still present, what is its
3 answers
asked by
Nellie
590 views
A radioactive isotope source has a mass of 120ug. If the isotope had a half life of 20s, what would be the mass if the isotope
2 answers
asked by
Jannet
1,136 views
Beryllium-7 has a half-life of 53 D. A sample was observed for one minute and there were 26,880 decays.
a.) what is the activity
2 answers
asked by
Samaira
752 views
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