Physical Properties Flashcards
1
Q
Why
- Atomic radii
- First IE
~
A
- additional e enters inner 3d subshell
- > SE bt nucleus and outer 4s e increases
- NC increases to a large extent;
- cancelled out by increase in SE
=> relatively constant ENC across the period
=> energy req to remove an e ax TM~same
2
Q
Why TM has high MP?
A
Use e from 4s and 3d subshell for metallic bonding;
More e in sea of delocalised e; higher positive charge on metal cations;
More energy is req’ to overcome the stronger efa bt…. ;
3
Q
Why TM has high electrical conductivity?
A
TM uses e from 4s and 3d subshells for metallic bonding;
More e in sea of delocalised e acting as charge carriers
4
Q
Why TM has high density?
A
Density= mass/volume
Greater relative atomic mass and smaller ionic radius;
Greater relative atomic mass to atomic radius ratio
