Extra Info Flashcards
1
Q
Diamond
A
- 4 carbon atoms
- hard and rigid structure
- high melting point and poor electrical conductivity
- tetrahedral array by covalent bonds
2
Q
Graphite
A
- 3 carbon atoms
- layer structure
- covalently bonded in a trigonal planar array
- good lubricant bc of London forces between layers
3
Q
C60
A
- MOLECULAR structure
- individual c atoms with covalent bonds
- hexagonal structure
4
Q
Trigonal Planor
A
120
5
Q
Trigonal Pyramidal
A
107
6
Q
Trigonal Bipyramidal
A
90 and 120
7
Q
Octahedron
A
90 and 180
8
Q
Bent
A
104.5
9
Q
Tetrahedral
A
109.5
10
Q
Melting
A
Ionic: high
Metallic: in the middle
Covalent: low
11
Q
Solubility
A
Ionic: dissolves in water and polar solutions
Metallic: generally don’t dissolve
Covalent: dissolve in non polar solutions
12
Q
Conductivity
A
Ionic: Water solutions (electrolytes) (not solid state)
Metallic: Conduct well
Covalent: poorly or not at all
13
Q
Other
A
Ionic: Strong crystal lattice
Metallic: luster and malleability
Covalent: weak crystal structure
14
Q
Formal Charge
A
shows the favored structure
15
Q
Sigma Bond
A
when covalent bond formed and two orbitals overlap head on
