both inhalation and ingestion of radon.In water prior to drinking,
alpha particles emitted by radon and its decay product quickly lose their energy and are taken up by other compounds in water.
Therefore,the exposure of the ingested radon along with the intake of water is less than the inhaled radon from the radon exhalation from the same water(Somashekar and Ravikumar,2010).
In the case of radium,human exposure through the ingestion/
consumption of radium in drinkable water should be taken into
account.