Catalyst – February 30-4, 2013 HW OUT PLEASE! Using the PT, choose and record an element from each of the following groups: Alkali Metals Transition Metals Noble Gases Anctinides Metalloids Halogens
Our Periodic Table – Thanks to Mosely
Today’s Agenda (FYI: Quizzes back tomorrow) Catalyst HW Questions? Notes: Periodic Trends PT Trends Work CUZ WE RIDIN NERDY! Project Work Time Exit Question, Lab Fees, and Progress Reports! HOMEWORK: PERIODIC TRENDS WORKSHEET
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”
HAPPY NERD DAY!!!! HW Questions???
Today’s Objectives SWBAT define periodicity. SWBAT describe the periodic trends for valence electrons, atomic radius, and electronegativity.
PERIODICITY AND PERIODIC TRENDS NOTES TITLE: PERIODICITY AND PERIODIC TRENDS
CHEMISTRY & YOU How are trends in the weather similar to trends in the properties of elements? Although the weather changes from day to day, the weather you experience is related to your location on the globe. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .
Periodicity is… Key Point #1: Periodicity is the quality or state of being regularly recurrent or having periods.
Periodic Trends Key Point 2: The trends and patterns on the periodic table help us both compare and contrast elements.
Note-Taking Strategy Use the chart in your notes – like this…. Vocab Word Periodic Trend
Nab that Vocab! Copy your definitions from yesterday into the table in your notes! Repeated writing may help you remember the definitions! Valence electrons: ??? Atomic radius: ??? Electronegativity: ???
Note-Taking Strategy To be filled in! To be filled in! Use the chart in your notes – like this…. Vocab Word Periodic Trend Valence electrons: ??? To be filled in! Atomic radius: ??? To be filled in! Electronegativity: ??? To be filled in!
Note-Taking Strategy To be filled in! To be filled in! Use the chart in your notes – like this…. Vocab Word Periodic Trend Valence electrons: electrons in the outermost (or outside/biggest) energy level To be filled in! Atomic radius: ??? To be filled in! Electronegativity: ??? To be filled in!
Note-Taking Strategy To be filled in! To be filled in! Use the chart in your notes – like this…. Vocab Word Periodic Trend Valence electrons: electrons in the outermost (or outside/biggest) energy level To be filled in! Atomic radius: how big an atom is, also known as atomic size To be filled in! Electronegativity: ??? To be filled in!
Note-Taking Strategy To be filled in! To be filled in! Use the chart in your notes – like this…. Vocab Word Periodic Trend Valence electrons: electrons in the outermost (or outside/biggest) energy level To be filled in! Atomic radius: how big an atom is, also known as atomic size To be filled in! Electronegativity: the ability of an atom to attract electrons to itself in a chemical bond; how much an atom wants electrons To be filled in!
LOOK OUT! VALENCE ELECTRONS TREND
Let’s look at Bohr Models… http://www.chemicalelements.com/show/electronconfig.html
TREND: Valence Electrons # of valence electrons increases from 1-8 as you go left to right (#A on top of PT) 1------------------------------------>8
Valence Electrons Write on your PT
LOOK OUT! ATOMIC RADIUS TREND
Ranked Small to Large: Na, K, Rb, Cs
LOOK OUT! ELECTRONEGATIVITY TREND
Ranked Small to Large: Ga, Ge, As, Se
Electronegativity Values for Selected Elements in Paulings H 2.1 Li 1.0 Be 1.5 B 2.0 C 2.5 N 3.0 O 3.5 F 4.0 Na 0.9 Mg 1.2 Al Si 1.8 P S Cl K 0.8 Ca Ga 1.6 Ge As Se 2.4 Br 2.8 Rb Sr In 1.7 Sn Sb 1.9 Te I Cs 0.7 Ba Tl Pb Bi
the Relationship Between Using Graphs to Understand the Relationship Between Atomic Radius and Electronegativity
GROUP 1 H + Alkali Metals
PERIOD 1 Li - Ne
Why is this relationship true? vs. LARGE EN = SMALL AR LARGE AR = SMALL EN
Work Time Complete worksheet from Ms. Stroh Help each other and ask questions when you’re all stumped! When you finish, you may work on your Periodic Table Project
PERIODIC TRENDS WORKSHEET Exit Question State the left to right trend for valence electrons. Which element has the largest atomic radius: Ag, Cu, Hg, or Zn? Which element has the largest electronegativity: Ag, Cu, Hg, or Zn? HOMEWORK: PERIODIC TRENDS WORKSHEET