When radiometric dating is done on a rock sample, the rock’s is determined.

Radiometric dating is done on rocks to determine their age

In this technique carbon -14 dating is used to determine the amount of carbon 14 which based on half life of the isotope gives the age of the rock.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: