D-Transition Elements (Metals)
| Formula / Notation | d-block: [noble gas](n-1)d^(1-10)ns^(0-2) |
|---|---|
| Also Known As | Transition metals; d-block elements; transition elements; inner d-series metals; TM elements |
What is D-Transition Elements (Metals)?
D-transition elements (also called transition metals or d-block elements) are elements in which the d orbitals are progressively filled. They occupy Groups 3–12 of the periodic table. They are characterised by variable oxidation states, formation of coloured compounds, catalytic activity, and ability to form complex ions. Examples include iron, copper, zinc, chromium, and titanium.
Formula & Notation
Other Names / Synonyms: Transition metals; d-block elements; transition elements; inner d-series metals; TM elements
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
D-transition elements (also called transition metals or d-block elements) are elements in which the d orbitals are progressively filled. They occupy Groups 3–12 of the periodic table. They are characterised by variable oxidation states, formation of coloured compounds, catalytic activity, and ability to form complex ions. Examples include iron, copper, zinc, chromium, and titanium.
Structural metals (iron, steel); catalysts (Fe in Haber process, Pt in catalytic converters, Ni in hydrogenation); electronics (Cu wiring, Ti in microelectronics); pigments (Cr₂O₃ green, CuSO₄ blue); stainless steel; biomedical implants (Ti, Co-Cr alloys)
Varies by element. Heavy transition metals (Cd, Hg, Pb — though Pb is not strictly d-block) are highly toxic. Chromium(VI) compounds are carcinogenic. Nickel compounds are allergenic and suspected carcinogens. Fine metal dusts are respiratory hazards. Always follow SDS guidelines.
The formula or notation for D-Transition Elements (Metals) is: d-block: [noble gas](n-1)d^(1-10)ns^(0-2)