SEC 2 - THE SIMPLEST MATTER

The students will:• Describe the relationship

between the elements and the periodic table.

• Explain the meaning of atomic mass and atomic number.

• Contrast Metals, Metalloids and non metals.

Terms to Know:• Atomic number• Mass number• Atomic mass• Metals• Non metals• Metalloids

ELEMENTS (118 )

Natural Elements(90 known)

Synthetic Elements(man made)

PERIODIC TABLE:• A chart of elements.• Helps scientist organize and display

elements.• Use Chemical Symbols• Arranged according to their properties.

Atomic Number:-The number of proton in the nucleus of an atom.

Mass Number:-The number of protons and neutrons in the nucleus of an atom.

Atomic Mass:- The weighted average mass of isotopes of an element. (μ)

Isotopes:Atoms of the same element that have different number of neutrons.

CLASSIFICATION OF ELEMENTS

METALS-shiny/metallic luster-good conductors of heat & electricity-solid @ room temp. except mercury.-malleable-ductile

NON-METALS-Dull-poor conductors-Gases @ room temp. except bromine.-Brittle-Essentials to chemicals of life.-97% body

METALLOIDS-share characteristics of metals & non metals-not as good as metals in conducting electricity.

NON METALS

METALLOIDS

METALS

SEC 3 COMPOUNDS AND MIXTURES

Students will:• Identify the characteristics of a

compound through observation.(Mini Lab)

• Compare and Contrast different types of mixtures.

TERMS TO KNOW:

• Substance• Compound

Substance:

-matter that has the same composition and properties throughout.

-can be an element (Ex. Hydrogen – H) or compound (Ex. H2O)

Compound: - a substance whose smallest unit is made up

of atoms of more than one element bonded together.

Ex. Hydrogen Peroxide ( H2O2)•

Water (H2O)

MIXTURES- a combination of two or more substances (element or compound)that has not formed a new substance.

2 kinds of Mixtures:Heterogeneous Mixture (different)Homogeneous Mixture (same)

Ways to separate Mixtures:

HeatingFilteringManual