structure Flashcards
1
Q
what bond does a simple covalent molecule have
A
weak bond
2
Q
what bond does a giant covalent molecule have
A
strong bond
3
Q
about giant covalent bonds
A
- high melting point & boiling point
- held together by strong covalent bonds in a giant covalent lattice
- these need a lot of thermal energy
4
Q
ionic bonding
A
- strong electrostatic attraction between oppositly charged ions
- metal & non-matal
5
Q
covalent bonding
A
- the sharing of a pair of electrons between 2 atoms
- electrostatic attraction between nuclei
6
Q
examples of giant covalent bond
A
- diamond
- graphite
7
Q
why is graphite soft
A
- layers are free to slide over each other because there are only weak forces between the layers
8
Q
why is diamond hard
A
- because it has a formation of very hard covalent bonds
9
Q
does diamond conduct electricity?
A
-no
- because it has no charged particles that are free to move
10
Q
does graphite conduct electricity
A
- yes
- because it has delocalised electrons which move between the layers
11
Q
metallic bonds
A
atoms share delocalised electrons
