Different types of bonds form different types of structures – lattices and molecules ... A salt is formed when an acid is neutralised by an alkali. Chemical analysis - (CCEA) Most elements ...

For example ... Determining structures of large molecular assemblies by methods including crystallography, electron microscopy and other imaging techniques will require clever chemical means ...

This means that the chemical formula used for a metal is simply the symbol for the element. For example, the formula for iron is Fe, even though a piece of iron contains very many iron atoms.