Catalyst – February 5x5, 2013 Week #7 Monday Mystery Element! (copy each clue, make 1 guess) Name comes from 2 Greek words meaning “green” and “twin” Found in the sand of Brazil, India, and Florida…also at the bottom of the PT Used to make electrodes in lamps

Praseodymium mystery element… Electrode—solid electric conductor through which an electric current enters or leaves an electrolytic cell or other medium

HOMEWORK: Workbook pg 71-74 HONORS HW: Workbook pg 70-73 Today’s Agenda Catalyst Quick Notes: Periodic Table Basics Quick Vocab! Periodic Table Project Work Time Exit Question HOMEWORK: Workbook pg 71-74 HONORS HW: Workbook pg 70-73

If you missed Friday’s quiz, you MUST make it up TODAY AT LUNCH If you missed Friday’s quiz, you MUST make it up TODAY AT LUNCH! Get a pass from Ms. Stroh!!!! If you don’t make up your quiz, you will get a ZERO!!! 

Today’s Objectives SWBAT identify the main regions and families of the periodic table. SWBAT define important words related to the periodic table. SWBAT understand requirements for the Periodic Table Project.

NOTES: PERIODIC TABLE BASICS

Navigating the Periodic Table Atomic Number (small whole number) Element Symbol (letters) Atomic Mass (big decimal number)

Find the atomic number of this element

Find the atomic number of this element

Atomic Number is an Element’s ID Number Like your social security number or a professional athlete’s jersey number, the atomic number of an element identifies that element

The Periodic Table Key Point #1: The periodic table organizes the elements into many different groups based on physical and chemical properties. We will learn about the major ways to group the elements – by… Family/Metals/Metalloids/Nonmetals Valence Electrons and Electron Configuration Atomic Radius (Size) Electronegativity

What does PERIODIC mean? Key Point #2: The term “periodic” means that there is some kind of pattern or grouping. In the Periodic Table, there are numerous patterns

Metals, Metalloids, and Nonmetals

Major Families H He Be B C N O F Ce Th

The Evolution of the Periodic Table In the late 1790s, French scientist Antoine Lavoisier compiled a list of elements known at that time……only 23! In the 1800s, scientists began discovering a ton of elements……up to 70!

John Newlands (1860s) Arranged the Periodic Table by increasing ATOMIC MASS Noticed patterns based on physical and chemical properties - repeated every 8th element Law of Octaves

Newland’s Periodic Table Law of Octaves

Mendeleev (1869) Arranged elements by increasing ATOMIC MASS into columns based on chemical and physical properties Left spaces for undiscovered elements First to publish table

Mendeleev’s Periodic Table EMPTY SPACES!

Mosely (1913) Arranged elements by increasing ATOMIC NUMBER Some of Mendeleev’s elements in the wrong order Periodic Law

Our Periodic Table – Thanks to Mosely

Metals, Metalloids, and Nonmetals

Major Families Noble Gases Alkali Metals Halogens Alkaline Earth Metals H He Be B C N O F Transition Metals Lanthanides Ce Th Actininides

Worksheet, then… Chapter 6 Vocabulary (on own paper, turn in to folder) Periodic Law Metals Nonmetals Metalloids Representative elements Atomic radius Ionization energy Electronegativity

Periodic Table Project Will choose an element from the list provided No one can have the same element! Part 1: Element Card for the wall (25 Points) Part 2: Element Facebook Page (75 Points) Cool Source! YouTube Periodic “Table of Videos”

HOMEWORK: Workbook pg 71-74 HONORS HW: Workbook pg 70-73 Exit Question Why is the term “periodic” used to describe the table of elements? What are the 3 main regions on the periodic table? What is your element? HOMEWORK: Workbook pg 71-74 HONORS HW: Workbook pg 70-73