What is radioactive half life of an element?

Answer 1

The half-life of a radioactive element is the time required for one-half of the nuclei of a radioisotope sample to decay to products.
Half-life (t½) is the time required for a quantity to fall to half its value as measured at the beginning of the time period.

Answer 2

The radioactive half-life of an element is the time it takes for half of the atoms in a sample of the element to undergo radioactive decay. It is a characteristic property of each radioactive isotope and can range from fractions of a second to billions of years.

Answer 3

That refers to the time it takes for half of the substance to decay, and convert to something else. By the way, the half-life is NOT defined for elements, but rather for nuclides, also known as isotopes. The same element can have different isotopes, with different half-lives, or some of the isotopes may be radioactive, others not.

Answer 4

The half-life of a radioactive element refers to the amount of time it will take for any given quantity of the element to become half as radioactive (emit half as much radioactivity) as it was (did).

Answer 5

Half-life :

Half-life of a radioactive element is the time taken by any element to become half of initial .

Eg : If you take 4 grams of radium,

time to become 2 grams of radium is half-life

Suppose time to become 2 grams is 2 hours

Then time to become 1 gram is also same and i.e., 2 hours

Time to become 0.5 gram is also same i.e., 2 hours.

So, Half-life of radium is 2 hours.

Note : Radioactive elements disintegrate continuously ..............

& Above described is just an example and not true

Answer 6

The radioactive half-life of an element is the length of time it takes for one half of the element to decay to something else. It is a logarithmic progression, meaning that at the end of successive half-lives, there will be 0.5, 0.25, 0.125, 0.0625, etc of the original sample left. The equation is...

AT = A0 2(-T/H)

...where A0 is the starting activity (amount of sample), T is some period of time, H is the half-life in units of T, and AT is the ending activity after time T.

Answer 7

There are too many elements, and too many isotopes of elements, to answer that question in this space. For more information, take a look at the NNDC database which is quoted in the Related Links below.

Answer 8

Half-life is the period of time it takes for a substance (element) undergoing decay to decrease by half. but its never half of time that takes whole substance to decay

Answer 9

A half-life for a radioactive element or isotope is the amount of time it takes for exactly half of a sample of that element or isotope to decay.

Answer 10

Depends on the element in question.