The group 1 elements react quickly with oxygen in the air at room temperature. Most transition elements react slowly, or not at all, with oxygen at room temperature. Some transition metals react ...

The transition elements are placed between groups 2 and 3 in the periodic table ...

These letters represent a pair of elements: hydrogen and carbon. Bonded together ... The more hydrogen utilized in our energy mix, the better life is for living things on Earth. For hundreds of years, ...