A pure substance is made of only one type of atom or only one type of molecule (a group of atoms bonded together). A pure substance is either classified as a element or a compound.
An element is a pure substance that cannot be broken down into different types of substances. ... Elements are arranged according to their properties in the Periodic Table. Examples of elements include carbon, oxygen, hydrogen, gold, silver and iron.
As you can see in the video everything in the world is made up of elements, but what happens when you combine elements together?
A compound is a substance that has two or more chemical elements whose atoms are bonded together. ... In salt, one atom of sodium bonds to one atom of chlorine to produce the resulting ionic compound sodium chloride.
All of these examples in this image are elements combined to form a compound.
What is a Mixture?
A mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.
In this picture you can tell that this is a mixture because the other properties and matter can be classified easily.
In this video try make sure you pay attention to the difference in a mixture and a pure substance.
As you saw in the video there are two different types of mixtures. Scroll down to find out what they are.
Homogeneous Mixture is a mixture which has uniform composition and properties throughout. For example, air is a homogeneous mixture of gases. A teaspoonful of table salt stirred into a glass of water also makes a homogeneous mixture. A homogeneous mixture has the same uniform appearance and composition throughout.
In chemistry, a solution is a homogeneous mixture composed of two or more substances.
As you can see in the photo the two substances are evenly mixed making this a solution.
A heterogeneous mixture is simply any mixture that is not uniform in composition. This means that the substances within the mixture are easily classified and can be separated physically.
These M&M's are a heterogeneous mixture because they can physically be separated.
Suspension & Colliod
A suspension is a heterogeneous mixture in which solute-like particles settle out of a solvent-like phase some time after their introduction. We apply the word 'suspension' when particles are big enough to eventually settle. If the particles are too small to ever settle, they are said to form a colloid.
Suspensions and colloids are heterogeneous mixtures. One example of a colloid mixture is milk.
An example of a suspension is oil and water mixed together. This is a suspension because the oil can be separated from the water and light can travel through it.