C2- Bonding, Structure And Properties Of Matter Flashcards
(28 cards)
What are ions?
Charged particles which can be single atoms or groups of atoms
Do metals lose or gain electrons to form positive ions?
Lose
What is ionic bonding?
When a metal and a non-metal react together
What structures and attraction do ionic compounds have?
Giant ionic lattice structure
Electrostatic forces of attraction
What is an example of a giant ionic lattice?
Sodium chloride
Do ionic compounds have a high or low melting point?
High melting point
What are covalent bonds?
When non-metals atoms bond together and share pairs of electrons
What force do covalent bonds have?
Electrostatic
How are covalent bonds drawn in a dot and cross diagram?
Electrons are drawn in the overlap
What type of bonds to simple molecular structures have?
Very strong covalent bonds
Do simple molecular substances have a high or low melting/boiling point?
Low
Why don’t molecular compounds conduct electricity?
They aren’t charged so there is no free electrons
What is a polymer?
When lots of small units are linked together to form a long molecule that has a repeating section
Why are polymers solid at room temperature?
The intermolecular forces between polymer molecules are larger, so more energy is needed to break them
Do polymers have a lower or higher boiling point than ionic or giant molecular compounds?
Lower boiling point
What are three examples of giant covalent structures?
Diamond
Graphite
Silicon dioxide
What is the bonding, melting and boiling point of giant covalent structures?
Strong covalent bond
Very high melting and boiling point
Don’t conduct electricity
How is diamond very hard?
Each carbon atoms form four covalent bond
Do diamonds conduct electricity?
No
Why is graphite soft and slippery?
There aren’t any covalent bonds between the layers, they’re only held together weakly, so they’re free to move over each other.
Does graphite conduct electricity and what is the melting point?
Conducts electricity
High melting point
What is graphene?
A sheet of carbon atoms joined together in hexagons
What are fullerenes?
Molecules of carbon, shaped like closed tubes or hollow balls
What could fullerenes be used for?
To deliver a drug into the body
They have a large surface area so they could help make great industrial catalysts
