In the centre of the Periodic Table there is a large block of metallic elements. We call these the transition metals or transition elements.
Many of the transition elements have similar properties, but they are also different from the other elements in the Periodic Table.
The Transition metals have a typical metallic structure which explains most of their properties The metal's atoms exist in a giant structure held together by metallic bonds, and the outer electrons of each atom can move about freely within the metal.
Like all metals, transition metals are very good conductors of electricity and heat because delocalised electrons carry the electrical current or the heat energy through the metal. The transition metals are also hard, tough and strong, yet we can bend or hammer them into useful shapes.
With the exception of mecury, which is liquid at room temperature, the Transition metals have very high melting points.
Many properties of the Transition elements are due to the arrangement of electrons in their atoms. In these elements as lower energy level is filled up between Groups 2 and 3. This partly-filled lower energy level explains why transition metals form brightly coloured compounds. It also results in their use as catalysts.
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