Atomic Number and Mass Number of Elements: Atoms are the building blocks of matter. They are responsible for the format of all living and non-living things. Understanding their molecular structure and ...

Chlorine naturally exists as two isotopes, \(_{17}^{35}\textrm{Cl}\) (chlorine-35) and \(_{17}^{37}\textrm{Cl}\) (chlorine-37). The abundance of chlorine-35 is 75% and the abundance of chlorine-37 is ...

Before you submit an error, please consult our Video Help page. Science Trek is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, ...