limitations of models (1 Viewer)

[safa-]

"discuss the limitations of models of ionic lattices, covalent molecules and covalent and metallic lattices." any help would be appreciated.

 

[ohexploitable]

They all have different bonding strengths, this can't be shown in the model. In the metallic lattice, the model can't show the delocalised electrons. Also, their properties can't be shown using the model.

Like... Metallic bonds are strong, malleable, conducts electricity, requires lots of energy to separate 'n' shit but this can't be shown using the lattice model.

 

[findsome1]

• Models are usually oversimplified, like ohexploitable said, in metallic bonds, models dont show the 'delocalised electrons' or sea of electrons nor do they show the strength of the bonds.
• The models are how scientists interpret their observations... meaning that all models related to each bonding arent nesseraily the same
• Models are based on what we know at the time, the models are made according to their properties... in the future who knows.. there might be more properties found of their bondings.

 

[norez]

Varieties in strength between metals, for example can't be shown in a model. Atoms and molecules are moving constantly, but you can't see that in most models.

The ball and stick model of ionic compounds, although highlights the presence of bonds, exaggerates the distance between the atoms. Others, like the space filling one, don't show the presence of bonding.

In covalent molecular, the lewis dot diagrams don't express the relative attraction of shareed electrons due to electronegativity. The structure sketches, like hydrocarbons, are misleading as most molecular compounds are 3D structures.