"The arrow and blue colored blocks in periodic table indicate transition elements. "
What is transition elements?
The type of elements in which the last electrons enter into d-orbital can be referred to as transition elements. They can be placed in the middle of the periodic table. they are indicated with blue color in the periodic table so that it is easy to identify transition element in periodic table. Transition elements can show colored property because it shows d-d transition.
The electronic configuration of transition elements can be shown as:
(n-1)[tex]d^{1-10}[/tex]n[tex]s^{1-2}[/tex].
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