C3 - Structure and bonding Flashcards
name 3 giant convalent substances
- diamond
- graphite
- silicon dioxide
what are fullerenes
a form of carbon having a large spherodial molecue consisting of hollow cage of 60 or more
what are examples of fullerens
- nanotubes
- buckminser
what is graphene
a single layer of carbon atoms tightly bonded together
what are some properties of graphene
light, thin, very strong
what is a ion
charged atoms with full outer shells of electrons
what is an ionic bond
when metals and non-metaks react charged particles
what is electroststic attraction
possitive and negative attraction
what is a giant lattice
the ions are held together by strong ionic bond
what are properties of ionic compounds
- high melting and boiling point
- only conducts in a liquid form
explain why ionic compounds have high melting/boiling points
because the ionic bonds are very strong requiring a lot of energy to break
what happens to metals in ionic bonding
the metal loses electrons to become a possitively charged cation (positively charged ion)
what happens to non-metals in ionic bonding
the non-metals accept electrons to become a negitively charged anion (negitively charged ion)
sodium chloride has a regular structure - a giant ionic lattice. Explain what this means
the lattice is formed because the ions attract each other and formed regular pattern with opposite charged
explain why NaCl conducts electricity when molten in a solution but does not when solid
the ions are free to move in the solution but not free to move in the solid
