Guide
1
How easily you can guess from the very naming, the metal lattice type occurs in metals.These materials are usually high melting point metallic luster, hardness, are good conductors of electricity.Remember that sites of this type are grates or neutral atoms or positive ions.In between nodes - electrons migrated and provides high electrical conductivity of such substances.
2
ion crystal lattice type.Keep in mind that it is inherent in oxides and salts.A typical example - well-known crystals of table salt, sodium chloride.The nodes of the lattices are alternated alternately positively and negatively charged ions.Such materials are
usually refractory with low volatility.As you can guess, they have an ionic type of chemical bond.
3
atomic crystal lattice type is inherent in the simple substances - non-metals, which under normal conditions represent solids.For example, sulfur, phosphorus and carbon.The nodes of the lattices are neutral atoms are connected to each other by covalent chemical bonds.These substances inherent refractoriness, water insolubility.Some (eg, carbon in the form of diamond) - extremely high hardness.
4
Finally, the last type of lattice - molecular.It is found from substances found in normal conditions in a liquid or gaseous form.How, again, can be easily understood from the name, the nodes of the lattices - molecule.They can be either non-polar form (in simple gases such as Cl2, O2) and polar species (the best known example - Water H2O).Substances with such a type lattice is not conducting, volatile, have a low melting point.
5
Thus, to determine with certainty what type of crystal lattice has a substance, you should find out what class of substances it is and what the physico-chemical properties of matter.