Bonding,structure and properties of matter Flashcards
What are the 3 allotropes of carbon
Diamond
Graphite
Fullerene
What is diamond
One giant molecule of carbon atoms
What is graphite
Layers of carbon atoms
What is fullerene
Molecular-scale tubes of carbon arranged similarly to the layers of graphite
What are the properties of diamond
Hard
High melting point
Insoluble in water
4 covalent bonds
Does not conduct electricity
What are the properties of graphite
Slippery
Insoluble in water
High melting point
Conducts electricity
3 covalent bonds
Delocalised electrons
What are the properties of fullerene
High melting point
Conducts electricity
3 covalent bonds
Delocalised electrons
What is a metallic bond
a force of attraction between delocalised electrons and positive metal ions
True or False
Non metal atoms can form covalent bonds with each other
True
covalent bonds only occur between non metal atoms
True or False
A buckminsterfullerene molecule is shaped like a ball
True
buckminsterfullerene is a hollow sphere made of carbon atoms arranged in rings
Why do most metals have high melting points
because they are held together by strong metallic bonds, which require a lot of energy to break.
Why can most metals be easily bent and shaped
Because the atoms in a metal are arranged in layers which can slide over each other, so metals can be bent or shaped without breaking the structure of the metal
