Diamond and silicon dioxide

Question 1

key facts about giant covalent molecules

Answer 1

always solid at room temperature
meaning they
have millions of strong covalent bonds
meaning they
have high mp and bp

Question 2

what is required to melt these compounds of giant covalent molecules

Answer 2

a great deal of energy is required to melt these compounds

Question 3

what is diamond formed from?

Answer 3

the element CARBON

Question 4

each carbon atom of diamond forms…

Answer 4

covalent bonds to 4 other carbon atoms

4 strong covalent bonds

Question 5

what level of mp and bp do diamonds have ?

Answer 5

VERY high mp and bp

mp= 3,700°C

Question 6

PROPERTIES OF DIAMONDS…

Answer 6

Each carbon atom forms 4 strong covalent bonds

Diamonds have a huge number of covalent gl bonds and these have to be broken when diamond is melted
this requires a great deal of energy

cannot conduct electricity(no free electron to carry electrical charge

Question 7

why can’t diamonds conduct electricity? ?

Answer 7

there are no free electrons to carry electrical charge

Question 8

what is the structure of silicon dioxide

Answer 8

silicone atoms and oxygen atoms covalently bonded together
it’s a giant covalent molecule meaning it contains a huge number of covalent bonds
this means it has a very high mp and bp as it requires a great deal of energy to break down the number of the strong covalent bonds

Question 9

what does a giant covalent molecule mean?

Answer 9

contains a huge large number of covalent bonds