Group 1 elements react with moist air. They are stored in oil to stop air and water vapour coming into contact with them. Moist air reacts with potassium to form potassium oxide. This creates a ...

Their discoveries are based on understanding chemical properties and describing their behavior using theories of physics ... such as: Emerging fields of materials science and molecular modeling.

Unlike the vast majority of elements, the rare earth element promethium has no stable isotopes, which means that it is ...