structure and bonding questions

  • Created by: EddieJ101
  • Created on: 16-05-18 20:28
what is an ion?
an atom with a charge
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how does ionic bonding occur'?
each atom loses or gains an electron.
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why do ionic compounds have high melting and boiling points
they have strong ionic bonds
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how does covalent bonding occur?
each atom shares an electron to create a full outer energy level
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why do small Covalent molecules have low melting and boiling points?
because they have weak inter-molecular forces
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which are bigger, a nanoparticle or an atom
a nano-particle as it contains several hundred atoms.
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what happens to the surface to volume ratio of particles as particle size decreases by ten times
it increases by 10 times.
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give an advantage of nano-particles
have an extremely high surface area to volume ratio
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give a disadvantage of nanoparticles
they can be absorbed into our cells which may lead to health problems in the future
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why do giant covalent molecules have a high melting and boiling points
because they contain strong covalent bonds which takes a lot of energy to break.
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why can diamond not conduct electricty
no free electrons to carry electrical charge.
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why is graphite slippery
it has no covalent bonds between the layers so the layers can slide
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why is graphite a good conductor of electrcity
it contains delocalised electrons
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give 2 uses of fullerenes
pharmaceutical delivery and lubricants
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why is there a strong electrostatic attraction in metallic bonding
as the positive metal ions are attracted to the negative sea of electrons
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Other cards in this set

Card 2

Front

how does ionic bonding occur'?

Back

each atom loses or gains an electron.

Card 3

Front

why do ionic compounds have high melting and boiling points

Back

Preview of the front of card 3

Card 4

Front

how does covalent bonding occur?

Back

Preview of the front of card 4

Card 5

Front

why do small Covalent molecules have low melting and boiling points?

Back

Preview of the front of card 5
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