To determine how many half-lives have passed, you would need to divide the total time passed by the half-life of the substance. The result would give you the number of half-lives that have occurred.
Sure but it depends on the radioactive elements halflives
sure, but all will be radioactive with short halflives.
heavier isotopes can be produces but their halflives are in the microsecond or shorter range.
in sc26354 passed
As of June 16th 2009, 166 days have passed.
962 years passed
1 year passed
962 years passed
As of 2023, 403 years have passed since 1620.
how many (number of chromosomes are passed from parent to offspring in asexual reproduction
15 years have passed since 1995.