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A half-life of one hour means that, in one hour, one half of an unstable nuclear substance, a quantity of some radionuclide, will decay. Since half-life is logarithmic, after a second hour, half of the half will decay, leaving one quarter, and, after a third hour, half of the quarter will remain, leaving one eighth, and so on. The equation for half-life is ...
AT = A0 2(-T/H)
... where A0 is the starting activity, AT is the activity remaining after some time T, and H is half-life in units of T.
Note that many radionuclides, when they undergo a decay event, will transmute into some other radionuclide, which also has a half-life. A consequence of this is that many samples have several different decay "daughter" products, with different half-lives and different equilibrium states, so the technique of measuring the amount of material can often be complex. Also, some radionuclides have multiple decay schemes, each with a different probability and each with a different half-life, again, complicating things.
Usually, half-life is constant so, if you can measure the half-life, you can often identify the radionuclide. The exception to this is radionuclides that decay by beta+ decay, but they have insufficient excess energy in the nucleus to initiate that without electron capture, but they are also in an ionized state, having no electrons. In this case, it will appear that half-life is extended.
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What is the Half life of penicillin?
Generally 1 hour or less.
How many seconds in a quarter of an hour?
There are 60 minutes in an hour and since "half an hour" is half of an hour, it will contain 30 minutes. Simply divide 60 by 2 to get the answer.
What is curie half life?
Half-life depends on the particular nuclide involved. You did not specify which nuclide. Please restate the question. Curie is a unit of radioactivity, expressed as 3.7x1010 disintegrations per second. It is not a radionuclide. If you meant curium, you still need to specify which isotope, because curium has several. The longest lived isotope of curium is 96247Cm, with a half-life of 1.56x107 years.
What is an isotope that the time it takes it to decay to half its original mass?
c.half-life
What is the half life of promethium?
Promethium 145 has a half life of 17.7 years. Promethium 146 has a half life of 5.53 years. Promethium 147 has a half life of o.22 years.
What is meant by one half hour?
Thirty minutes.
Is 30 minutes in half an hour?
I think what you meant is: Is 30 minutes the same as half an hour? If that was what you were trying to say then, yes... 30 minutes does equal a half an hour.
What is meant by half life of radioactive isotopes?
This is the time in which half the the atoms was disintegrated.
How far is daily city from Santa Rosa?
If you meant daly city, it is about an hour in a half.
State what is meant by half life of radioactive isotopes?
This is the time in which half the the atoms was disintegrated.
What is the Half life of penicillin?
Generally 1 hour or less.
Is it half an hour or half a hour?
half an hour
What is meant by the half-life of a radionuclide?
It's the time it takes for half of the atoms of a given sample of a radionuclide to decay.
How much game battery life does a ipod touch have?
About an hour and a half.
What is half of an hour of an hour?
A half-life of one hour means that, in one hour, one half of an unstable nuclear substance, a quantity of some radionuclide, will decay. Since half-life is logarithmic, after a second hour, half of the half will decay, leaving one quarter, and, after a third hour, half of the quarter will remain, leaving one eighth, and so on. The equation for half-life is ...AT = A0 2(-T/H)... where A0 is the starting activity, AT is the activity remaining after some time T, and H is half-life in units of T.Note that many radionuclides, when they undergo a decay event, will transmute into some other radionuclide, which also has a half-life. A consequence of this is that many samples have several different decay "daughter" products, with different half-lives and different equilibrium states, so the technique of measuring the amount of material can often be complex. Also, some radionuclides have multiple decay schemes, each with a different probability and each with a different half-life, again, complicating things.Usually, half-life is constant so, if you can measure the half-life, you can often identify the radionuclide. The exception to this is radionuclides that decay by beta+ decay, but they have insufficient excess energy in the nucleus to initiate that without electron capture, but they are also in an ionized state, having no electrons. In this case, it will appear that half-life is extended.
How long does ampicillin stay in your system?
Half life of ampicillin is 1 hour.
What is the half-life of the element that registers 360 counts per hour and 18 hours later the rate becomes 45 counts per hour?
After 3 half lifes there will 45 counts per hour (360 -> 180 -> 90 ->45). Therefore 3 half lifes equals 18 hours. One half life is therefore 6 hours.
