T2 Covalent Bonding, Simple Molecular and Giant Covalent Structures Flashcards
1
Q
What is covalent bonding?
A
A strong electrostatic force of attraction between the shared pair of electrons and positive nuclei
2
Q
What is a covalent bond between?
A
Metal and non-metal
3
Q
What is a molecule?
A
A molecule is a fixed number of atoms joined together by covalent bonds
4
Q
What is the bonding in a simple molecular structure?
A
- covalent
- Weak intermolecular forces of attraction between the molecules
5
Q
Do simple molecular structures have a high or low melting/boiling point and why?
A
- Weak intermolecular forces of attraction between the molecules.
- These require little energy to overcome them (break)
- Therefore these substances have low melting points.
6
Q
Do simple molecular conduct electricity?
A
No - there are no charged species that are free to move so the substance will not conduct electricity
7
Q
Give 3 examples of giant covalent structures
A
- diamond
- graphite
- fullerene C60
