Raden-222 is a naturlly occuing isotope with a half life of 3.8 days if 4.0g of raden 222 gas wewre pumped in a container then how much radon -222would be in the container 7.6 das later

What is the primary function of the nervous system?

Which coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity