The 14th International Conference on

Miniaturized Systems for Chemistry and Life Sciences

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The d-block is on the middle of the periodic table and includes elements from columns 3 through 12. It appears since the 4th row. These elements are also known as the transition metals because they show a transitivity in their properties i.e. they show a trend in their properties in simple incomplete d orbitals. Transition basically means d orbital lies between s and p orbitals and shows a transition from properties of s to p.

The d-block elements are all metals which exhibit two or more ways of forming chemical bonds. Because there is a relatively small difference in the energy of the different d-orbital electrons, the number of electrons participating in chemical bonding can vary. This results in the same element exhibiting two or more oxidation states, which determines the type and number of its nearest neighbors in chemical compounds.

The d-block elements are unified by mostly having one or more chemically active d-orbital electrons. The d-orbitals can contain up to five pairs of electrons; they have a crucial importance for chemistry of elements in columns 3–11. Due to capacity of the d-subshell the block includes 10 columns in the periodic table.


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