Atoms, Molecules and Matter Copy the Concept Map to the Right and Fill it in with the words below: ATOMS COMPOUNDS MATTER Is composed of… Bond together to form…

Is composed of… Bond together to form… Matter Atoms Compounds Atoms, Molecules and Matter

Matter Matter is the “stuff” of which the universe is composed. Two characteristics: has mass and occupies space.

Atoms Can we see atoms?  Scanning Tunneling Microscope Matter is composed of tiny particles called atoms. A scanning tunneling microscope image of 5 nm gold nanoparticles staff/DHIRANI/

Compound vs Molecules A molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds.

Each unit is a molecule

Molecules Molecular hydrogen (H 2 ), and molecular oxygen (O 2 ) are molecules because each is composed of a single element. Water (H 2 O), carbon dioxide (CO 2 ) and methane (CH 4 ) are compounds because each is made from more than one element. The smallest bit of each of these substances would be referred to as a molecule.

Compounds Atoms of different elements can join together by chemical bonds to form a compound A compound has totally different properties from its elements

Sodium Chloride Sodium: Silvery White Metal Chlorine: Pale Green Gas

Diatomic Molecules NOFClBrI [H] NitrogenBromine Oxygen Iodine FluorineHydrogen Chlorine

Diatomic Molecules BrINClHOF Bromine Iodine Nitrogen Chlorine Hydrogen Oxygen Fluorine

States of Matter SolidLiquidGas Model

Mixtures A mixture is a substance made by combining two or more different materials in such a way that no chemical reaction occurs. A mixture can usually be separated back into its original components. What are examples of mixtures?

Prefixes Homo: Greek = Same Latin = Human Hetero: Greek = Mixed What words using these prefixes come to mind?

Mixtures Homogenous Mixture: the particles are mixed so well that the separate parts cannot be seen (Salt Water) Heterogenous Mixture: the different parts can be easily seen (Salt and Pepper)

Sand

Sand close up collections.ic.gc.ca/.../ magnified-sand_sa.htm

Homogeneous Heterogeneous

Element Diamond Bucky Ball

Atom Carbon Bohr Model