Elements, Compounds, and Mixtures – song song

 Describe pure substances.  Describe the characteristics of elements, and give examples.  Explain how elements can be identified.  Classify elements according to their properties.

 State the Law:  Explain what it means in your own words, with an example  Apply to “Observing a Chemical Reaction”

 A substance in which there is only one type of particle.

Elements are made up of SAME tiny particles: smallest particles of an element with the same properties of the element

IRON, HYDROGEN, ALUMINUM, OXYGEN Elements can be further classified Into 3 groups: METALS METALLOIDS NONMETALS

 pure substance that cannot be separated into simpler substance by physical or chemical means.

Diatomic Molecule Is made up of two of the same atoms of elements that are chemically bonded together H 2, N 2, O 2, F 2, Cl 2, Br 2, I 2 We are the same!!

 All matter in the universe is made from about 100 different substances, called  All matter is composed of elements.  Each element is made of the same atom.  Atoms will combine in whole number ratios to form compounds.

 A substance in which there is only one type of particle.

Atoms of same element Cu Copper element Na Sodium element He Helium element Diatomic Molecules of same element H Hydrogen H 2 gas O H O Oxygen O 2

MetalsNonmetalsMetalloids Shiny appearanceDull appearanceCan be shiny or dull Solids at r.t.p (except mercury) Gases, liquids or solids at r.t.p (room temp & pressure) ??? Malleable, Ductile, Sonorous Brittle if solid (general)Somewhat malleable and ductile High melting and boiling points Low melting and boiling points Good conductors of heat Poor conductors of heat Some conduct heat Good conductors of electricity Poor conductors of electricity (except carbon and graphite) Some conduct electricity Examples: Copper Lead Tin Examples: Sulfur Iodine Neon Examples: Silicon Boron Germanium

Elements Iron (Fe) Sulfur (S) Compounds Iron (II) Sulfide FeS Pure substances have all same particles. Elements ---Atoms Compounds ---molecules

Elements Aluminum (Al) Bromine (Br) Aluminum bromide AlBr 3

 Directed Reading Directed Reading  Elements Quiz Elements Quiz  Self Check Quiz #1 Self Check Quiz #1  Thermite Reaction: Thermite Reaction iron oxide & Al does the Iron have the same properties as the Iron oxide rust???