Giant Covalent Structures Flashcards
1
Q
How are atoms bonded in giant covalent structures?
A
Strong covalent bonds
2
Q
Why do giant covalent structures have high melting and boiling points?
A
Lots of energy needed to break covalent bonds
3
Q
Why don’t giant covalent structures conduct electricity?
A
Don’t contain charged particles
4
Q
3 examples of giant covalent structures
A
Diamond
Graphite
Silicon Dioxide
5
Q
Diamond
A
Made up of carbon atoms
Each carbon atom forms 4 covalent bonds
Very hard
Very high melting point
Doesn’t conduct electricity - no free electrons or ions
6
Q
Graphite
A
Each carbon atom forms 3 covalent bonds
Sheets of hexagons
High melting point
Conducts electricity because has one delocalised electron
7
Q
Graphene
A
Sheet of hexagons
1 atom thick
Very strong - light
Conducts electricity - contains delocalised electrons
