Unit 1 - Periodic Table Intro Agenda: Do Now History Lesson? Coloring Activity?? Lecture Activity Activity Questions Homework Periodic Table Practice Sheet Do Now: Why do we have a Periodic Table of Elements? Goal: I will be able to identify the major parts of the periodic table and explain the properties of metals, non-metals, and metalloids through taking notes, watching a video, coloring periodic tables, and performing an activity. MondayTuesdayWednesdayThursdayFriday Matter Periodic Table Friday Rewind/ACT

A Brief History of the Periodic Table

History of the Periodic Table 1829: Dobereiner arranged the elements by mass and identified the halogens (group 7) and noble gases (group 8)

History of the Periodic Table 1864: Newlands noticed property patterns and reported the law of octaves (8)

History of the Periodic Table 1869: Meyer noticed a relationship between properties and atomic mass

History of the Periodic Table 1896: Dmitri Mendeleev (father of the periodic table) arranged elements by atomic mass and properties

History of the Periodic Table 1914: Henry Moseley arranged the elements by their atomic number and properties

History of the Periodic Table SUMMARY: First was arranged by ATOMIC MASS, then by ATOMIC NUMBER and PROPERTIES

Organizing groups by common properties

The periodic table tells us about the elements Find the Key on your periodic table (it uses sodium)

7 PERIODS - horizontal rows 18 GROUPS (families)- vertical columns whose elements have similar properties. –There are 8 major groups (1A to 8A) Periods and Groups

On your new periodic table (that you got today) - Label Groups the 8 major groups in one color Label Periods the 7 periods in another coll

Transition metals, Lanthanides, and Actinides

Add in Transition metals, Lanthanides, and actinides

Outline general categories in metals, non- metals, and metalloids- either Make a KEY

Metals On the left side of staircase (most of the elements!) As you move further to the left and down, there is more metallic character Conductors of heat and electricity Malleable (can be hammered into thin sheets) Ductile (can be pulled into wires) Lustrous (shiny) Example: Gold

Nonmetals Found on the right side of the staircase. As you move to the right and up, there is more non- metallic character. Low boiling points, brittle, dull, good insulators Example: Sulfur

Metalloids/semimetals - Found along the staircase. Have properties of metals and non-metals Tend to be good semiconductors in transistors. Example: Silicon

Metallic and non-metallic character

Groups with Special Names: -Group 1 (1A) Alkali Metals – soft metals that are extremely reactive. -Group 2 (2A) Alkali Earth Metals – shiny reactive metals -Group 17 (7A) Halogens - Extremely reactive nonmetals - Group 18 (8A) Noble Gases - Inert gases (unreactive with other elements).

Color in the four groups with special names

Metal, Non-metal, or Metalloid Activity Groups of four 1 Leader 1 Speaker 1 Material Manager 1 Time Keeper ALL are HELPERS And RECORDERS

Pre - lab Malleable – will NOT break/shatter when hit with a hammer but may change shape/flatten Brittle – WILL break/shatter when hit with hammer

Demonstration for physical property