D and F Block Flashcards
Why is Scandium considered a transition element?
It contains ‘incompletely filled’ (n-1)d subshells.
Why is Zinc not considered a transition element?
It contains ‘completely filled’ (n-1)d subshells.
What is the electronic configuration of Zn2+?
[Ar] 4s0 3d10
What is the electronic configuration of Mn2+?
[Ar] 4s0 3d5
What type of magnetism does Zn2+ exhibit?
Diamagnetic
What type of magnetism does Mn2+ exhibit?
Paramagnetic
What is an alloy?
It is a homogeneous mixture of a metal with other metals or metalloids or non-metals.
Give an example of an alloy used in jewelry.
Gold
What are two examples of alloys?
- Brass: 60-80% Cu; 20-40% Zn
- Bronze: 75-90% Cu; 10-25% Sn
What are coordination compounds?
These are compounds having coordinate covalent bonds.
Give two examples of coordination compounds.
- [Co(NH3)6]Cl3
- K4[Fe(CN)6]
What are interstitial compounds?
These are compounds in which small sized non-metallic atoms occupy the interstitial sites in their lattices.
Give an example of an interstitial compound.
Steel (made by adding small size carbon atoms in between the larger atoms in Iron).
What is the role of V2O5 in chemical reactions?
It is used as a catalyst in the manufacturing of SO3 from SO2.
What is the role of Fe in chemical reactions?
It is used as a catalyst in the manufacturing of NH3.
Fill in the blank: An alloy adds more _______ properties to the original metal.
desirable
