answer is b
...age of the sample.
absolute age
relative age
Absolute Age
The half-life can be used to determine the absolute age because the original amount of the elements can be calculated from the current value.
4) latitude
4) latitude
gusset
half; 415 (apex)
The most important is the half life; also the type of decay, energy of released particles.
Half life of an element can't be changed.. It is a characteristic of a radioactive element which is independent of chemical and physical conditions.. Half life is that time in which half of radioactive sample( i.e., a radioactive element) decomposes. So no matter what amount you take half life of an element remains same.
The half-life of an isotope is how long it takes for half of the atoms in a mass to undergo radioactive decay. Say you have 40g of an elements isotope with a half-life of one year. After 1 year, there would be 20g of that isotope left, and 20g of a different isotope/element. After 2 years, there would be 10g, and so on...