Covalent substances Flashcards
1
Q
What are the most molecular substances?
A
Liquids and gases
2
Q
What do molecular substances not conduct?
A
Electricity
3
Q
What are the 3 main metals only made from carbon atoms?
A
Diamond, Graphite and Silicon Dioxide
4
Q
Name 5 facts about diamond
A
Have 4 covalent bonds Very rigid Hardest natural substance Pretty & sparkly Hight b.p and m.p
5
Q
Name 3 fact about Silicon dioxide
A
It is what sand is made of
Each grain of sand
very high m.p and b.p
6
Q
Name 4 facts about Graphite
A
Three covalent bonds
Layer which are free to slide off each other
Have weak intermolecular forces between layers
Good conductor of head and electricity
