The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called

Answer : The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called Half-life.

Explanation :

Half-life of radioactive isotope decay : It is defined as the rate at which a decay is measured in half-life. Or we can say that the time it takes for (1/2) half of the nuclei in a radioactive sample to decay to its stable isotope.

The radioactive isotope decay shows first order reaction. The formulas used for first order reaction is,

where,

= radioactive half-life

= radioactive decay constant

Hence, the correct answer is, Half-life.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it