TLF ID L5825
Test your understanding of the particle nature of matter. From a number of particle-level views of substances, choose the one that fits the type of matter required: solid, liquid, gas, pure substance, mixture, element, compound. For example, distinguish an element from a mixture and a pure compound. This learning object is the last in a series of six objects that progressively increase in difficulty. This content is also suitable for use on tablet devices (Android and iPad).