bonding structure and properties of matter
what is ionic bonding
"Ionic bonding is a chemical bonding process that involves the transfer of ions between a metal and a non-metal; the oppositely charged metal and non-metal ions will have an electrostatic attraction between them.
properties of ionci compounds
- high boiling and melting point
-conduct elecricity in liquid or molten , never in solid
- hard and brittle
why does ionnic compunds have high melting point and boiling point
becuase of their strong electrostatic bonds , it is much harder to break their bonds [ how they get tomelting and boiling point ] when tehy have high melting and boiling point
why does ionic compunds conduct in water but not as a solid
Conductivity : they conduct electricity in only when molten or dissolved in water , beacuse when they are solid thier ions cannot move around and conduct ellectricity
what is covalent bond[ 1 sentece]
shared pair of electron between two atoms
covalent bond occur between
2 non metals
covalent bonded sustance can be ___,____,___
simple moleule , very large molecule, giant covalent strucutre
small moleulle can exist as_____
solid liquid or gas
how is m and b poin tin small moleule and why
low becuse of weak intermolecuar forces
____ conductos of electriicty
poor
3 example for small molecule
water , oxygen , methane
large molecule hav e____ forces in between
strong
many large moleucle are form through ____
polymerization
how is m and b point in large molecule
stronge
-_____ conductors of electriicty [ large molecule]
poor
example for very large moleucle
polymre , dna
giant covalent strucure , m and point
high
giant covalent strucutre are hard or soft
hard
how is the electrical conductivity of giant covalent strucutre
can be semi conductors or insulators
efficent ___ conductivity
thermal
example of gaint covalent strucuture
daimond , grapphite, silicon dioxide
the intermoleuclar increase teh size of the moleucle _____
increase
what is a polymer
very large molecule with repeating of monemers
polymarization???
the process in which monmers join together to form reapeating units of cell
properties of polymer
- coavlent bond
-felxibel and elstic
- low melting and boiling point
-solid at room temp
-low density
-does not allow electriicty to pass through them [insulators]
state the allotropes of carbon
diamond, graphte, fulleriens,nanotubes graphine
strucuutre of diamond????
- giant lattice strucuture
-each carbon atom is bonded with 4 other carbon atoms
porperteis of diamond
-hard
-strong
transperent
high melting anf boiling point
do not conduct electricity
high thermal energy
why is dimaond hard
strong covaleent bond
why dont diamond conduct electriicty
no free electron
strucure of graphite??
in layers
weak attraaction between layers
hexagon shaped layers
bonding in graohite??
each carbon atom bonded with only 3 ohter carbn atom
properties of graphte??
- conduct electriicty
lubricating
moderate hardness
why is graohite used as a lubricator
layers can slide off eaachother
struucutre of fullerine
buckministerfullerine
pentagonal and hexoanal shaped
hollow and sperical
properties of fullerine
-holow and sphirical
structure of nano tubes
cylindrical tubes
long
properteos of nanotubes
any type of conductivity
high thermal conductiivty
storng
application of nano tubes
medical electronics computer[?]
say everyhting abou tgroahine kiddo
single layer, honey comb patter, single layer of graphite,conduct electricity the best,used in electricial anad energy storage
strucutre of metalic bond
positive metal ions is attracted to negative delocoloside electrons,
arragend in patterns
free electrons
bonding of metalic bond
shairng of electorn among all metal ions
properteis of metallic bond
conduct electiricty
ductile, malleabl
thermal conductiveity
high melting and boiling point
hard
example of metalic bonded substance
alumium , coppper, iron
what are alloys
mixtre of metal and othe rsubstance
why alloy hard and pure metal soft
alloy - distorted layers
metal- neat layers