If a radioactive sample contains 1.25g of an isotope with a half-life of 4.0 days, then 0.625g (1/2) of the isotope will remain after 4.0 days, 0.3125g (1/4) after 8.0 days, 0.15625g (1/8) after 12.0 days, etc.
AT = A0 2(-T/H)
The half-life of this element will be 2 days since it will lose half its mass in the first two days, so 100g to 50g, then half the resulting mass in the next two days (now totaling 4 days), so 50g to 25g in four days.
So the half-life (in case the above was a bit rambling) is 2 days - at which point the element has lost half its original mass...which, of course, is what a half-life is :))
Half of any amount will be decayed 4 days after you start watching it.
It never goes all the way to zero.
For example, if you'll work it out, you'll find that after 100 days, there is
0.0000000298 of the original radioactive sample still remaining.
The half-life of the element is 2 days.
It has decayed to half, i.e 50 g in two days and then to half of that, i.e 25g in two half-lives.
it can't do that unless the decay products are all gasses.
9 years.
No, the half life remains exactly the same throughout
The length of time depends on the element and isotope, but the point at which half of the sample has decayed is known as the half-life.
Iodine-131 has a half-life of about 8 days.
The time it takes for half the atoms in a sample of a radioactive element to decay is called the half life.
It tells what fraction of a radioactive sample remains after a certain length of time.
The length of time required for half of a sample of radioactive material to decay
It is through radioactive decay that a quantity of an unstable element will decay over time. A material that is unstable will undergo this process, and the sample is said to be radioactive.
No, the half life remains exactly the same throughout
The length of time depends on the element and isotope, but the point at which half of the sample has decayed is known as the half-life.
halflife
A sample of 187 rhenium decays to 187-omium with halflife of 41.6 billion years. If all 188 osmium are normalized isotopes.
i got no idea
Iodine-131 has a half-life of about 8 days.
Uranium is the element that decays at a rate that relates to the sample. Uranium is the element that decays at a rate that relates to the sample.
Half life of an element can't be changed.. It is a characteristic of a radioactive element which is independent of chemical and physical conditions.. Half life is that time in which half of radioactive sample( i.e., a radioactive element) decomposes. So no matter what amount you take half life of an element remains same.
Chawad says... They are directly proportional
It really applies to radioactive isotopes, not elements. An element may have different isotopes, some of which are radioactive, some not.The half-life is the time it takes for half of a sample to decay - for the atoms to convert to some other type of atom.