# Earth science lab radiometric dating

Consult your lab manual and materials for details. N P is the number of parent atoms. Round each answer to the nearest million years - exampleyears would be entered as ; 9, years would be entered as What is the half-life of 40 K?

N D is the number of daughter atoms. The purpose of this portion of this exercise is to practice determining radiometric ages using graphical techniques and mathematical techniques. Mathematical calculation of radiometric dating involves the use of a simple equation.

Ages can be determined using the equation:. Enter the appropriate value in the space provided. Round the answer to the nearest million years - as shown above Using the half-life calculated above, complete the Half-lives Elapsed column in the table.

Complete columns 1 and 2 in the table below. The greater the number of daughter isotopes, the older the mineral. For example, after one half-life 0.

Divide the value in column 2 by the value in column 1. Unless otherwise noted, all images and graphics contained within are the property of Richard Harwood and may only be reproduced with permission from the author.

If the half-life is 5, years, determine the age of the sample. The age of a mineral is internet matchmaking sites from the number of parent and daughter isotopes it contains.

Only column 3 will be graded. Using the graph, determine the number of half-lives elapsed for each sample.

After two half-lives 0.