Select all answers that apply. for radiometric dating, you need to know which of the following?
the rate at which radioactive decay occurs
collection of fossil shells from sedimentary rocks
how much radioactive decay has occurred
the sequence of rock layers

Option (1) and (3)

Explanation: Radiometric dating is a very efficient method of dating a rock or fossil or any object. It helps in determining the estimated age of that particular object.

The half-life of all the radioactive methods are already known, so it becomes easy to determine how much decay an object has undergone. So by knowing the rate at which the decay occurs, one can find out the approximate age by using the radioactive decay formula.

Thus, the correct answer is option (1) and (3).

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide