Giant Covalent Structures (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
📚Flashcards
Practise the cards
12 cards from this deck
ShowHide
Practise the cards
12 cards from this deck
Giant covalent structures definition
Giant covalent structures definition
Huge networks of atoms bonded by covalent bonds
Examples of giant covalent structures
Examples of giant covalent structures
Diamond, graphite, silicon dioxide (silica)
Melting/boiling points of giant covalent structures
Melting/boiling points of giant covalent structures
Very high
Why giant covalent structures have high melting points
Why giant covalent structures have high melting points
Strong covalent bonds require lots of energy to break
Electrical conductivity of most giant covalent structures
Electrical conductivity of most giant covalent structures
Do not conduct electricity
Why most giant covalent structures don't conduct electricity
Why most giant covalent structures don't conduct electricity
No free-moving charged particles
Which giant covalent structure conducts electricity?
Which giant covalent structure conducts electricity?
Graphite
Structure of graphite
Structure of graphite
Layers of carbon atoms arranged in hexagons
Physical properties of graphite
Physical properties of graphite
Soft and slippery
Why graphite is soft and slippery
Why graphite is soft and slippery
Layers slide over each other due to weak forces between them
How many bonds does each carbon atom form in graphite?
How many bonds does each carbon atom form in graphite?
Three bonds
Why graphite conducts electricity
Why graphite conducts electricity
Each carbon forms 3 bonds, leaving one free electron to move through layers