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C3.7 - Giant covalent structures

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Total cards: 8•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (8)

#1
Front (Question)

giant covalent structures

Back (Answer)

huge 3D network of covalently bonded atoms

#2
Front (Question)

Properties of giant covalent structures

Back (Answer)

• insoluble • very high melting/boiling points • hard (except graphite) • cannot conduct electricity (except graphite)

#3
Front (Question)

Bonding in graphite

Back (Answer)

-1 carbon atom is covalently bonded to 3 other C atoms -forming hexagons - arranged in giant layers -weak intermolecular forces between layers + allowing the layers to slide over each other = soft material

#4
Front (Question)

delocalised electrons

Back (Answer)

electrons that are no longer associate with any particle -can move around freely

#5
Front (Question)

How does graphite conduct electricity

Back (Answer)

-as only 3 of its electrons are covalently bonded, 1 electron from each atoms is free -so the delocalised electrons carry electrical charge + they move towards the positive terminal in the battery

#6
Front (Question)

What happens to graphite when it conducts thermal energy?

Back (Answer)

• causes the delocalised electrons to move around quicker along the layers of the graphite • energy is being transferred

#7
Front (Question)

Why can diamond not conduct electricity?

Back (Answer)

• as all 4 of its atoms’ electrons are being used up - it has no delocalised electrons to carry charge

#8
Front (Question)

allotropes

Back (Answer)

different forms of the same element