americium-241 is a radioactive substance used in smoke detectors. the half life of americium is 432 years. if a smoke detector initially contains 1 gram of americium 241, how much will remain in 432 years?

0.5 g

Explanation:

The half-life of a radioactive isotope is the time it takes for a certain amount of that isotope to halve.

In this case, we have an isotope of Americium-241, which has a half-life of

This means that after 1 half-life (432 years), there will be an amount of americium equal to half its initial amount.

In this problem, the initial amount of americium is

Therefore, after 432 years (1 half-life), the amount of americium left will be half:

see earlier answer

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this