heterogeneous mixture Class Starter Use a concept map and/ or drawings to show your understanding of the following terms relating to the material world. matter mixture atom molecule heterogeneous mixture pure substance compound homogeneous mixture element

What is MATTER? Matter is anything that has mass and takes up space (volume). All matter is made up of tiny particles called atoms. These particles are constantly moving, they are never stable. This is known as the particle theory of matter  

What is an ATOM? An atom is the smallest particle of matter. Atoms are composed of subatomic particles: protons (+) neutrons (neutral) electrons (-)

All about ATOMS Atoms rarely exist alone in nature, instead they combine with other atoms to form MOLECULES. Molecules consist of atoms bonded together by chemical forces. Example: Water (H2O)

Complex Molecules

What is the difference between… a pure substance, heterogeneous mixture and homogeneous mixture? Pure Substance Homonegenous Mixture Heterogenous Mixture

Pure Substances There are two types of pure substances, elements and compounds. An ELEMENT is a substance that cannot be separated into simpler substances by chemical reactions. IT IS COMPOSED OF ONLY 1 TYPE OF ATOM! Examples: gold, carbon

Gold

Elements Each element is represented by a symbol: the first letter is always a capital if there is a 2nd or 3rd letter it will always be lower-case. There are over 100 elements known to man but only 25 of them are essential to life carbon (C), oxygen (O), hydrogen (H) and nitrogen (N) alone make up 96% of all the matter on Earth

Periodic Table

Pure Substances A COMPOUND is a chemical substance of two or more different chemically bonded (attached) elements. It consists of more than 1 type of atom Example: salt (NaCl)

What is a MIXTURE? A mixture is any substance that contains at least 2 different types of substances or particles. There are two types of mixtures: Homogeneous Heterogeneous

Heterogeneous Mixtures You can visibly see the 2 particles. ex: vegetable soup, granite The substances can be separated physically (mechanically).

Homogenous Mixtures The substances can be separated chemically You cannot visibly distinguish the two particles. ex: apple juice, tap water The substances can be separated chemically

Homogenous Mixtures A solution is homogeneous mixtures in the liquid phase. A colloid is homogeneous mixtures in which the substances that compose it can be distinguished using a microscope.