Limitations of bonding diagrams Flashcards
State the advantages of dot and cross diagrams
xx H .x O .x H
x x
Advantages of dot and cross diagrams
Since dots are used to represent the electrons from one atom and crosses are used to represent the electrons from another atom, it is very clear where the electrons are coming from
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State the disadvantages of dot and cross diagrams
Disadvantages of dot and cross diagrams
Dot and cross diagrams do not tell us about the shape of the molecule
State the disadvantages of two dimensional stick diagrams
disadvantages of two dimensional stick diagrams
The problem with two dimensional stick diagrams is that because a covalent bond is shown as a stick, it is not clear which electron in the bond came from which atom.
Stick diagrams do not give us an idea of outer electrons that are in bonds
2 dimensional stick diagrams do not give accurate information on the shape of the molecule
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State the advantages of three dimensional stick diagrams
the advantages of three dimensional stick diagrams
The benefit of a 3 dimensional stick diagram is that it shows us the shape of the molecule
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State the disadvantages of using the ball and stick model
disadvantages of using the ball and stick model
There are no gaps / sticks between the potassium ions and sulfide ions
The ions are shown as widely spaced when in reality the ions are packed together
The model is not to scale
The relative sizes of the ions are not shown
Only shows a tiny part of the giant lattice, so this diagram gives a mistaken impression about the sizes of these structures
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State the advantages of a ball and stick diagram
The benefit of a ball and stick diagram is that it allows us to clearly see the ions in 3 dimensions
Suggests that the ionic lattice extends beyond what is shown in the diagram
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State the advantages of a space filling diagram
Space filling diagram gives us a better idea of how closely packed the ions are.
Shows the relative sizes of the ions
Shows the regular pattern of the ionic lattice structure
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State the disadvantages of a space filling diagram
Disadvantages of a space filling diagram
It can be difficult to see the three dimensional packing with a space filling diagram
Only lets you see the outer layer of the compound
Only shows a tiny part of the giant lattice, so this diagram gives a mistaken impression about the sizes of these structures
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