C2 Flashcards
What is an example of Giant structures?
diamond, silicon dioxide
What are the properties of giant structures?
They have high melting and boiling points due to strong bonds
What do ionic bonds form between?
metal and non-metal
What the structure of an ionic bond?
giant lattice structure
Do ionic bonds conduct electricity?
dont conduct as solids but do if molten
What are the properties of ionic bonds?
high melting and boiling points and strong bonds
What do covalent bonds form between?
non-metals
What is the structure of covalent bonds?
giant or molecular
What are the differences between giant and molecular covalent compounds?
Giant have a high melting and boiling points due to strong electrostatic forces. molecular have low melting and boiling points due to there weak intermolecular forces.
Do covalent bonds conduct electricity?
No because they have no mobile electrons
What do metallic bonds form between?
metals
Why is there an electrostatic attraction in metallic bonds?
positive metal ion and negative sea of electrons
What is the structure of metallic bonds?
always giant
What are the properties of metallic bonds?
high melting and boiling points
do metallic bonds conduct electricity?
yes due to mobile electrons
bonus property of metal bonds?
malleable due to layers of ions sliding
what charge is metals usally?
posative
Wat charge is a non-metal usally?
negative
What is an alloy?
mixture of two or more elements in which one has to be an element
Whats happens to electrons in a covalent bonds?
Shares Elctrons
What happens to electrons in ionic bonds?
losses or gains an electron
Do giant covalent structures have intermolecular forces
no
What type of bond shares electrons
covalent
What type of bonds gains or losses an electron
ionic
Do polymers have intermolecular forces
yes
do polymers have high melting and boiling points?
yes
which bond gains or losses electrons?
ionic
What are the four state symbols?
(s) for solid, (l) for liquid, (g) is for gas and (aq) for aqueous solution
What is an aqueous solution?
a substance where the solvent is water
What is an allotrope?
properties of some chemical elements to exist in two or more different forms, in the same physical state. eg diamond, coal, graphite are all allotropes of carbon
what is fullerene?
A fullerene is an allotrope of carbon whose molecules consist of carbon atoms connected by single and double bonds so as to form a closed or partially closed mesh
Give some uses for nanoparticles
medicines, electronics, bioengineering,
