Diamond and Silicon Flashcards
What are some elements that are small covalent molecules?
- Hydrogen
- Oxygen
- Nitrogen
Small covalent molecules have …
low melting and boiling points
Why do small covalent molecules have low boiling points
because they have very weak intermolecular force
What giant covalent molecules at room temperature
solids
How many millions do giant covalent molecules have to bond?
one million
Giant covalent molecules always have…
high melting and boiling point
What element are Diamonds formed from?
carbon atoms
How many carbon atoms does it take to form a strong covalent bond?
four
What happens to diamonds when melted
huge number of covalent bonds are broken
What can’t diamonds do?
conduct electricity
Why can’t diamonds conduct electricity?
no free electrons to carry an electrical charge.
What does Silicon dioxide have a very high of?
high melting and boiling point
To break down Silicon dioxide huge number of strong covalent bonds you need?
a great deal of energy
What does graphite have a high of?
high melting and boiling point
What does graphite feel like in two words?
soft and slippery
What element is graphite formed from?
carbon atom
What happens to that carbon atom
forms three covalent bonds
Then what happens to the three covalent bonds?
it forms a hexagonal rings
What are the hexagonal rings have
layers
What happens between the layers?
there are no covalent bonds between the layers so they can slide
