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How much of an 800-gram sample of potassium-40 will remain after 3.910000000000 years of radioactive decay?
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Will the radioactive property remain in an ionic compound when a metal element is highly radioactive combined with a non-metal element which is non-radioactive?
A radioactive material is radioactive. Period. The atoms of radioactive material have unstable nuclei. If you combine them with other material, the radioactive material will remain unaffected as regards its radioactivity. Recall that radioactivity is related to the instability of atomic nuclei, and the atomic structure of atomic nuclei are (in general) not involved in chemical bonding. Chemical bonding doesn't affect the stability of the nuclei of atoms. If they are unstable, they will remain so whether the atoms are alone or chemically combined with something else.
Has Uranium changed over time?
The chemical and physical properties of uranium remain unchanged. But because uranium is a radioactive element the quantity of uranium on the earth is permanently changed due to radioactive decay.
What happens to a radioactive nucleus when it emits gamma ray?
It's atomic number decreases by 2 (because it has lost two protons) but as an alpha particle is two protons and two neutrons the Atomic Mass decreases by 4.
The half-life of 220Fr is 27.5 sec Calculate the fraction of 220Fr that remains after 1.0 min?
If the half-life of an isotope is 27.5 sec, then one minute is 2.18 half-lives. Radioactive decay is an inverse exponential process, base two, so 2-2.18, or 0.2207 of the original material would remain after one minute. This is half-life mathematics that applies to all radioactive decay. This answer does not confirm nor deny that the half-life of 220Fr87 is 27.5 seconds.
What is the half life of a radioactive substance that has changed through radioactive decay after 40 days the original substance left is one sixteenth of the original amount?
Let us use the expression = time duration = number of half lives x half life Given 40 = 4 x half life So half life = 10 days. Remaining = 1/16 = (1/2)4. So 4 half live have gone. If the number of half lives is n then (1/2)n would remain.
After three half-lives what fraction of a radioactive sample will remain?
Approx 1/8 will remain.
Will the radioactive property remain in an ionic compound when a metal element is highly radioactive combined with a non-metal element which is non-radioactive?
A radioactive material is radioactive. Period. The atoms of radioactive material have unstable nuclei. If you combine them with other material, the radioactive material will remain unaffected as regards its radioactivity. Recall that radioactivity is related to the instability of atomic nuclei, and the atomic structure of atomic nuclei are (in general) not involved in chemical bonding. Chemical bonding doesn't affect the stability of the nuclei of atoms. If they are unstable, they will remain so whether the atoms are alone or chemically combined with something else.
What percentage of a radioactive element will remain after seven half lives?
1/27 = 1/128 = 0.78125%
How much cesium would remain from a 10g sample after 4 years?
I suppose that you think to the radioactive isotope Cs-17; After 4 years remain 9,122 g.
What emits radioactive material as it gets older?
The type of radiations remain the same during time for a specific isotope.
What does the mantle remain from radioactive decay?
Very hot and although still solid able to flow in convection currents.
How much of an 800-gram sample of potassium-40 will remain after 3.9109 years of radioactive decay?
100 grams
What fraction of a radioactive nuclei remain after p half lives?
The remainder is 2-p or 0.5p of the original amount.
Has Uranium changed over time?
The chemical and physical properties of uranium remain unchanged. But because uranium is a radioactive element the quantity of uranium on the earth is permanently changed due to radioactive decay.
If a radioactive material has half a life of 10 years what fraction of the material will remain after 30 years?
There will be 1/8 remaining.
If a radioactive material has a half-life of 10 years what fraction of the material will remain after 30 years?
One eighth would be left.
You start out with 10000 radioactive atoms Their half life is 2 days How many will remain in 6 days?
1250 on day six
