Displayed - shows all the bonds and all the elements in the order which they occur
The structural formula or Lewis structure of a molecule provides more informations.
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A structural formula provides the most information because it shows not only which elements and how many atoms of them are present in the molecule, but it also shows how the atoms are arranged in the molecule.
Most often the formula of a compound is written in a way that predicts the arrangement of its atoms.
The more or most electropositve element.
Cr2O3
The formula for magnesium sulfide is MgS. MgS would make the compound neutral, which is the goal for most elements.
A structural formula provides the most information because it shows not only which elements and how many atoms of them are present in the molecule, but it also shows how the atoms are arranged in the molecule.
The most important compound of aluminium is the aluminium trioxide - Al2O3.
Lipids(fat)
Most often the formula of a compound is written in a way that predicts the arrangement of its atoms.
, sodium phosphate
Because is the most simplified method of representation.
The more or most electropositve element.
Cr2O3
Fe3Cl
The most common nickel sulfide has the chemical formula NiS.
cl-s-s-cl
The most common compound between sodium and sulfur that does not contain other elements has the formula Na2S.