Elements, Mixtures and
Elements: An element is a pure substance that cannot be separated into simpler substances by physical or chemical properties that help you classify them. An example of a element is iron, coal.
Pure Substance: A pure substance is a substance in which there is only one type of particle. These particles, called atoms, are too small for us to see. For example, every atom i a 5g nugget of the element gold is like every other atom of gold.
Elements can be identified be their unique properties, Their melting point or their physical properties, Hardness, texture and color.
Classifying Elements: Metals Conduct heat, electricity and there shiny, Nonmetals make up the second categories of elements. They do not conduct heat or electric currents, and solid nonmetals are dull in appearance. Metalloids, which have properties of both metals and nonmetals.
A compound is a pure substance composed of two or more elements that are chemically combined.
Properties of Compounds: As an element does, each compound has its own pysical properties.
Some compounds can be broken down into their elements by chemical changes.
Mixtures can be broken down for example aluminum foil can become a tin can.