series of chemical elements
Transition metals are a series of chemical elements that sit in the middle section of the periodic table, between the main group metals on the left and right sides. They're important because they have useful properties like the ability to form multiple types of chemical bonds and compounds, making them valuable for manufacturing everything from steel to medicines.
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Transition metals in the periodic table
In chemistry, a transition metal (or transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and less often group 3) are sometimes excluded. The lanthanide and actinide elements (the f-block) are called inner transition metals and are sometimes considered to be transition metals as well.
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