Transition Metals Flashcards
Which transitional metals are an exception to the aufbau principle?
> Chromium
Copper
What is the oxidation number of oxygen?
- 2
What is one method of figuring out whether oxidation or reduction has occurred?
Calculating the oxidation number
What are ligands and how do they form bonds?
Negative ions or molecules with non-bonding pairs of electrons that they donate to the central metal atom or ion, forming covalent bonds.
When does the splitting of d-orbitals to higher and lower energy levels occur?
When the electrons present in approaching ligands cause the electrons in the orbitals lying along the axes to be repelled in a transitional metal.
What happens when an electron in a lower energy d-orbital is promoted to a d-orbital of higher energy?
Light is absorbed
Why are transitional metals and their compound particularly helpful in reactions?
As they can act as catalysts
Explain heterogeneous catalysts?
Heterogeneous catalysts allow activated complexes to form during the presence of unpaired d-orbitals by providing a reaction pathway with a lower activation energy.
What’s the oxidation number of hydrogen?
+ 1
