DO NOW: Complete 4.2 Exit Ticket! Take out page 3 and 5 of your 4.2 packet and staple these papers together. Write your name on top and Lab #9.
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1 Unit 4 NAME Class Work 11/25/ Valence Electrons and Lewis Dot Diagrams DO NOW: Complete 4.2 Exit Ticket! Take out page 3 and 5 of your 4.2 packet and staple these papers together. Write your name on top and Lab #9.
2 Agenda: Do Now/ObjecOve Video Hook Mini Lesson Classwork Exit Ticket Homework
3 Video Hook (5 minutes) What are some physical similarioes between these metals?
4 Post- Video What are some similarioes between these metals in chemical properoes?
5 New Vocabulary Lithium, sodium and potassium are in the same group in the periodic table What is a group**? A group** on the periodic table is a verocal column
6 New Vocabulary Boron, carbon, and oxygen are in the same period in the periodic table What is a period**? A period** on the periodic table is a horizontal row
7 New Vocabulary Valence electrons** are electrons in the outermost electron shell
8 Example: How many electrons are in the first shell? How many electrons are in the second shell? How many electrons are in the third shell? How many valence electrons are in Na?
9 Your Turn Find the electron configuraoon for the following elements and circle the valence electrons. Magnesium Potassium Xenon Ca- 40
10 Lewis dot diagram: used to show the number of valence electrons in an atom where each dot represents a valence electron! What is the electron configuraoon for Cl? How many valence electrons does it have?
11 Lewis Dot Diagrams Cl
12 Name the steps What are the steps to drawing electron dot diagrams?
13 Quick PracOce Draw a Lewis Dot Diagram for the following elements: Hydrogen Carbon Oxygen Fluorine Sulfur Bromine
14 Turn and Talk What do elements with similar chemical properoes have in common in their Lewis dot structures?
15 What is the total number of valence electrons in an atom of carbon in the ground state?
16 Classwork Complete 4.3 Classwork quietly with your neighbors. If you finish early, check your answers with Ms. Hart and then you can move onto independently working on your homework!
17 Exit Ticket Complete the 4.3 Exit Ticket
18 Complete 4.3 HW HOMEWORK
19 PART TWO! 4.4 Wave Mechanical Model Timeline of the Atom SPARK: What is the mass of a proton? What is the mass of a neutron? How many protons are in oxygen? What is the difference between a ground state and an excited state? Draw the Bohr Model for lithium ObjecOve SWBAT describe the evolution of the atom.
20 Agenda: Do Now/ObjecOve Homework Review Wave- Mechanical Model Timeline of the Atom Review Homework!
21 Wave Mechanical Model The last one!!!! The scienost Schrödinger said that the electrons were not in energy levels, but instead in something called orbitals**. Orbital** - probable locaoon of an electron
22 Wave Mechanical Model IMPORTANT: The Schrödinger atomic model (or wave mechanical model) describes the locaoon of the electrons orbiong the nucleus more accurately than other models. However, the Bohr model is more useful when predicong chemical bonding and describing chemical properoes of elements.
23 Timeline of the Atom Using your notes, create a Omeline of the atom on your loose leaf sheet of paper. Be sure to include: the scienosts name the type of experiment they did the major discoveries they found! Get your work checked by Ms. Hart and then move onto 4.4 Classwork!
24 4.4 Review Sheets You have the remainder of the period to complete your Review sheets. ASK FOR HELP!
25 HOMEWORK Complete all 4.4 worksheets AND 4.3 WS Quiz on Tuesday! Watch this at home: hmp:// just_how_small_is_an_atom.html?.
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