`""^(226)Ra` disintegrates at such a rate that after 3160 years, only one fourth of its original amount remains . The half life of `""^(226)Ra` will be

Radioactive elements decays at such a rate that after 68 minutes only one-fourth of its original amount remains. Calculate its decay constant and half life period.

A radioactive isotope decays at such a rate that after 192 minutes only 1/16 of the original amount remains. The half life of the radioactive isotope is

A radioactive isotope decays at such a rate that after 192 minutes only 1/16 of the original amount remains. The half-life of the radioactive isotope is

If in 3160 years, a radioactive substance becomes one-fourth of the original amount, find it’s the half-life period.

If in 3160 years, a radioactive substance becomes one-fourth of the original amount, find it’s the half-life period.

One gram of .^(226)Ra has an activity of nearly 1 Ci. The half life of .^(226)Ra is,