# 'Radiocarbon dating' is used to find the age of formerly-living things. The halflife of carbon-14 is 5730 years. By how much will the original amount of #""^14C# decrease after 5 halflives?

##### 1 Answer

The amount of

#### Explanation:

Every half life period the amount of substance will reduce by half. For example after one half life of 5730 years the amount of

If you start with

After 2 half lives (11460 years) there will be

After 3 half lives (17190 years) there will be

After 4 half lives (22920 years) there will be

and after 5 half lives (28650 years) there will be

This technique is only suitable for up to about 50 000 years as the quantities of