Chemical Properties Flashcards
1
Q
Why TM has variation OS
A
close similarity in energies bt 4s and 3d subshell;
small increase in successive IE;
e can be lost from both 4s and 3d subshell;
forming stable ions or cmpd
2
Q
Max OS =
A
Loss of both 4s e and unpaired 3d e
3
Q
Why can form complex?
A
Central TM ion is relatively small and highly charged;
High charge density;
Great polarising power and ample empty energetically favourable orbitals
4
Q
Why TM exhibits catalytic activity?
A
Provide alternative rn pathway w low Ea;
5
Q
Why TM acts as homogeneous catalyst?
A
Variation OS;
Gain or loss e readily;
Speed up rn through e transfer
6
Q
Why TM acts as heterogeneous catalyst?
A
Partially filled or empty d-orbitals;
Forming temporary bonds w reactant molecules;
Providing a surface for rn to occur
