Transition Metal Definitions Quiz
- Created by: une-meduse
- Created on: 04-06-13 21:29
Other questions in this quiz
2. Transition metals can be used as catalysts, they do this by providing a surface on which a reaction can take place, or by
- Changing oxidation states and binding to reactants forming intermediates as part of a chemical pathway with a lower activation energy
- Titanium in joint replacement parts, nickel alloyed with copper for 'silver' coins etc
3. Transition elements are able to form coloured compounds due to
- Oxidation states, all forming compounds with ions in the 2+ oxidation state (this is usually the result of losing two electrons from 4s orbital, which are lost first as when full 4s is in a higher energy level that 3d)
- Absorbtion of a specific wavelength of light but reflection or transmission of another wavelength
- The 4s orbital fills before the orbitals in the 3d sub shell. The d block metals will have filled there 4s orbital before electrons are added to the 3d sub shell
4. Copper-oxygen bonds are longer than copper-nitrogen bonds so the shape of the [Cu(NH3)4(H2O)2]2+ complex ion is described as
- Tetrahedral
- Square planar
- Distorted octahedral
- Octahedral
5. Chemical reactions that are catalysed by transition metals or their compounds include the Haber process to make ammonia, Contact process to make sulfuric acid and
- Hydrogenation of alkenes to make saturated compounds, and Manganese (IV) oxide in the decomposition of hydrogen peroxide
- Titanium in joint replacement parts, nickel alloyed with copper for 'silver' coins etc
- Changing oxidation states and binding to reactants forming intermediates as part of a chemical pathway with a lower activation energy
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