# You are given a very old sample of wood. How will you determine its age? - Chemistry

Short Note

You are given a very old sample of wood. How will you determine its age?

#### Solution

The age of the wood sample can be determined by radiocarbon dating as 14C becomes a part of a plant due to the photosynthesis reaction (i.e., absorption of  [14CO2 + 12CO2].

1. The activity (N) of a given wood sample and that of a fresh sample of the live plant (N0) is measured, where, N0 denotes the activity of the given sample at the time of death.
2. The age of the given wood sample, can be determined by applying following Formulae:
t = 2.303/lambda log_10  "N"_0/"N"
where lambda = 0.693/(5730 "y") = 1.21 xx 10^-4 "y"^-1
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#### APPEARS IN

Balbharati Chemistry 11th Standard Maharashtra State Board
Chapter 13 Nuclear Chemistry and Radioactivity
Exercises | Q 2. (J) | Page 202
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