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

Rubies and emeralds have the colors they do because, like many substances, they absorb some colors of light. Most visible light, like sunlight, is composed of all the colors of the rainbow: red, ...

The table shows the melting point and density of iron, compared to three non-transition metals. Iron, a transition metal, has a higher melting point and a higher density than the non-transition ...