Do now:• Sit with partners• Take out HW• Take out Periodic Table Scavenger Hunt

Common characteristicsMetals• Few electrons in outer

energy level• Solid at room temp• Hg is liquid at room temp• Good conductor of

heat/electricity• Shiny• Malleable

Nonmetals• Not malleable/ductile• Not shiny• Poor conductors of

heat/electricity

Metalloids• Shiny/brittle • Hard• Good conductors of

heat/electricity• 1/2 of complete set of

electrons in outer level• Properties of metals &

nonmetals

• Zig-zag reminds you where metals, nonmetals, and metalloids are

Metals= BLUEMetalloids= GREEN

Nonmetals= YELLOW

Liquids (2)• Mercury• Bromine

Gases (11)• Nitrogen• Oxygen• Fluorine• Neon• Helium• Chlorine

• Argon • Krypton • Xenon • Radon • Hydrogen

Radioactive• 31 elements• #'s 34-115• #'s 93-103• 43 & 61

Lanthanides & Actinides• Removed to allow the table to be

narrower

Three letter symbols• Are temporary• Based on atomic #'s of the

elements• Official names and symbols will

be approved by international committee of scientists

Rows= PeriodsColumns= Groups/Families

Mendeleev VS Moseley

Mendeleev• Discovered a pattern to the elements

1869• Wrote names and properties of the

elements on cards• Arranged these by diff. Properties• Density• Appearance• Melting point

• Arranged by increasing atomic mass

Moseley• Determined number of protons

(Atomic number) in an atom• Rearranged the PD Table by

increasing atomic number

• Chemical/Physical Properties Definitions Posted on Assignments Tab

Chemical • Forms a new substance during a

reaction such as:Rusting of iron

Physical • Can be observed or measured

such as a transformation between phases:

gas to liquid to solid