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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?
Wiki User
∙ 11y ago
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.
Wiki User
∙ 11y ago
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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 can be observed only when a substance is changed to another substance?
We can observe the relise of force when a substance is canged into another substance.
What changes if the degree (amount) of intermolecular bonds of a substance are changed?
density of a substance and volume of a substance
What substance is changed to a new substance?
Any substance can be changed to a new one.Answ2. The above is wrong. Lead for example cannot be changed into nitrogen.If some of the nucleus of an atom can have a proton or neutron, added or subtracted, then an isotope can be created, though generally an isotope of the same element.Consider the decay of K40 into Ar40. This is a change of one substance into another.
Which element of an original work can be changed in adaptation?
Setting
How do you determine the half life of a radioactive substance that has changed through radioactive decay After 40 days the original substance left is is one sixteenth of the original amount?
the halflife is 10 days
Does the process of radioactive decay fall under the study of chemistry or physics or is it a combination of both?
Radioactive decay falls under chemistry, because the chemical properties of the substance are changed during radioactive decay.
What is changed in the original substance during a chemical reaction?
It all depends on what chemicals you are using. For example, if you were using sulfur & carbon, either one could be changed.
How the radioactive decay rate be changed?
The rate cannot be changed.
Has polonium and radium changed at all?
Being radioactive and unstable elements they are continuously changed.
What alters a substance into another?
Heat can alter a substance into another substance. Such as when you bake a cake the batter is changed into a cake and can not be changed back.
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 changed when the amount of a substance changed?
total thermal energy
What can be observed only when a substance is changed to another substance?
We can observe the relise of force when a substance is canged into another substance.
What is a substance that cannot be changed into a simpler substance?
You think probable to an atom.
What changes if the degree (amount) of intermolecular bonds of a substance are changed?
density of a substance and volume of a substance
Is it true that a substance produced during a chemical change cannot easily be changed back into the original substance?
generally no, but sometimes yes. if one or more of the products is insoluble or otherwise removes itself from the other products, then the reaction is considered irreversible.
