Monday, November 17th, 2014 HW= Agenda #1-3, C1-2 Objective: We will be able to calculate the average atomic mass of an element based on isotope abundance. Standard: IOD 401 Catalyst: Please answer question #1 on the back of your catalyst sheet. Classroom expectations: Wear Kenwood ID. Cell phones, music players, and headphones are put away. Food is disposed of or put away. Dressed appropriately. Notebook is out and you are ready for today’s class. Table of Contents: 12 Week 12 Catalyst Chart 60 12 Week 12 Agenda 61 12 Notes: Isotopes 62

Announcements Test NEXT MONDAY!!! Tutoring Tuesday and Wednesday THIS WEEK!!

Agenda Catalyst Announcements Homework Review Isotopes Notes Exit Slip

Week 11 Homework 1. 1.06 x 1024 atoms of Magnesium 2. 0.9265 moles of Gold 3. 890 g of Sodium 4. a. 2 b. 8 c. 18 d. 32 5. Protons 6. a. 80 P, 121 N, 80 E b. 74 P, 110 N, 74 E 7. Valance electrons tell us the number of electrons in the outmost shell. 8. a. 7 b. 9 c. 22 d. 7

Isotopes Recall Atoms with the same number of protons, but different numbers of neutrons. Atoms of the same element (same atomic number) with different mass numbers Isotopes of Chlorine 35 Cl 37 Cl 17 17 Chlorine - 35 Chlorine - 37

Isotopes Recall Despite these differences, isotopes are chemically alike because they have identical numbers of protons and electrons. Neon-20, neon-21, and neon-22 are three isotopes of neon, a gaseous element used in lighted signs. Comparing and Contrasting How are these isotopes different? How are they similar?

Isotopes Recall Isotope Protons Electrons Neutrons Nucleus Hydrogen–1 (protium) 1 Hydrogen-2 (deuterium) Hydrogen-3 (tritium) 2

Review: Check for Understanding Fluorine has an atomic number of 9. Write out the name of the isotope of fluorine that has 8 neutrons. Fluorine-17

Review: Check for Understanding Fluorine has an atomic number of 9. Write out the SYMBOL of the isotope of fluorine that has 10 neutrons. Mass #  19 F Atomic #  9

Review: Check for Understanding Three isotopes of chromium are chromium-50, chromium-52, and chromium-53. How many neutrons are in each isotope, given that chromium has an atomic number of 24? Chromium-50: 50-24 = 26 neutrons Chromium-52: 52-24 = 28 neutrons Chromium-53: 53-24 = 29 neutrons

Average Atomic Mass What is average atomic mass? Average atomic mass is the weighted average of the atomic masses of the naturally occurring isotopes of an element The average mass on the periodic table is closest to the ISOTOPE of GREATEST abundance

Check for Understanding The average atomic mass of Carbon, C, is 12.01 amu. Predict which isotope has the greatest percent abundance based upon the average atomic mass. Carbon – 10 Carbon – 12 Carbon – 13 Carbon -- 14

Whiteboard Practice Show all of your work when completing the problem. DO NOT hold up your board until told to do so.

Tuesday, November 18th, 2014 HW= 4-6, C3 Objective: We will be able to explain why atoms form ions and draw Bohr models to illustrate this process. Standard: IOD 201 Catalyst Answer Choices: F. medium G. low to medium H. medium to high J. high Classroom expectations: Wear Kenwood ID. Cell phones, music players, and headphones are put away. Food is disposed of or put away. Dressed appropriately. Notebook is out and you are ready for today’s class. Table of Contents: 12 POGIL: Ions 63

Announcements Test NEXT MONDAY!!! Tutoring today and Wednesday!!

Agenda Catalyst Announcements Homework Review Isotopes Review Ion POGIL Exit Slip

Problem #1 Write the isotope SYMBOL for the following: Neon -22 Ne Magnesium-26 Mg 22 10 26 12

Problem #2 Helium has two naturally occurring isotopes, He-3 and He-4. The atomic mass of helium is 4.003 amu. Which isotope is more abundant in nature? Explain. He-4 is more abundant in nature because the atomic mass is closer to the mass of He-4 than to the mass of He-3.

Problem #3 Determine the protons, neutrons, and electrons in the isotopes of silicon: Silicon-28 P = 14 E = 14 N= 14 Silicon-29 P = 14 E = 14 N = 15 Silicon-30 P = 14 E= 14 N = 16

POGIL Remember your roles! Captain-leader! Spokesperson-asks questions! Manager-supplies and reads! Quality Control-checks answers!

Period 2 Group 1: Kamyl Mariah Ronald Janea DESKS!! Group 2: Jeremy Breona Ladjion Lilronald Group 3: Marquell Jazmine Kai Group 4: Zlandria Yah Ike Rajah Group 5: Jakobi Quinetta Lorenzo Group 6: Cemarah Coumba Dajionae Group 7: Brianna Christian Alyssa Group 8: Manny Rashad Naimah

Period 7 Group 1: Gabe Caira Cheyenne Group 2: Malcolm Jacob Kendra DESKS!! Group 3: Kyle Derek Kevin Group 4: Joseph Kensington Malik Monee Group 5: Jared Juwan Amiyah Tionna Group 6: Martez Marieal Bonito Group 7: Alexandria Tyrone Group 8: Samiyah Tril Xavier

Period 8 Group 1: Calvin Amber Siniah DESKS!! Group 2: Dwight Imani Shanelle Group 3: Tiffany Cairo Jasmine Group 4: Keyshawn Jade Dre Group 5: Armani Nykira Koby Group 6: Arryl Unique Group 7: Tia Curtis Alisia Group 8: Rayshon Remi

Exit Ticket Based on what you did today, what are : 3 things you learned about ions? 2 questions you have about ions? 1 thing you wonder about ions?

X X X Door Front Table Door Mariah Alyssa Jakobi Kamyl Yah Ladjion Jazmine Quell Ronald Coumba Rashad Breona Janea Zlandria Naimah Quinetta Manny Brianna LilRonald Emmanuel Rajah Jazmine Ike Dajionae Cemarah CB Chem Period 2 Lorenzo Quinetta Christian X X X

X X X X Door Front Table Door Jacob Kendra Monee Malcolm Caira Jared Tyrone Kensington Xavier Tionna Juwan Tionna Bonito Cheyenne Marieal Amiyah Malik Alexandria Kevin Joseph X Kyle Derek Samiyah CB Chem Period 7 Tril Martez X X X

X X X Door Front Table Door Rayshon Tia Jade Dwight Calvin Jasmine Alisia Remi Siniah Amber Arryl Unique Shanelle Nykira Koby Dre Cairo Tiffany Imani Armani Curtis Keyshawn CB Chem Period 8 X X X

Wednesday, November 19th, 2014 HW= 20-22, C4 Objective: We will be able to explain why atoms form ions and draw Bohr models to illustrate this process. Standard: Catalyst Answer Choices: A. Pressure B. Temperature C. Metamorphic Grade D. Depth Classroom expectations: Wear Kenwood ID. Cell phones, music players, and headphones are put away. Food is disposed of or put away. Dressed appropriately. Notebook is out and you are ready for today’s class. Table of Contents: 12 Classwork: Ions 65

Announcements Test on Monday! Tutoring today until 4pm!

Agenda Review POGIL Notes: Ions Practice: Ions

HW Review

POGIL Review

Classwork Take out your worksheet for today’s lecture. Answer this question at the top: In your own words what is an ion and how is it different from a neutral atom?

Ions An ion is an atom with a positive or negative charge. Occur when there is an unequal number of protons and electrons.

Ions Ions are created by the loss or gain or electrons.

Discuss Lithium atoms like to form lithium ions with a +1 charge. Why can’t you add 1 proton to a lithium atom to form the lithium ion?

**Key Point Why do neutral atoms form ions? An atom is most stable when it has a full outer shell with valence electrons. Atoms will gain or lose electrons until they are stable and have a full outer shell.

Thursday, November 20th, 2014 HW= 7-12, C5 Objective: We will be able to explain why atoms form ions and draw Bohr models to illustrate this process. Standard: IOD 503 Catalyst Answer Choices: Question #5!! A. Facies A B. Facies F C. Facies E D. Facies G Classroom expectations: Wear Kenwood ID. Cell phones, music players, and headphones are put away. Food is disposed of or put away. Dressed appropriately. Notebook is out and you are ready for today’s class. Table of Contents: 12 Classwork: Ions 64

Announcements Test on Monday! Tutoring today until 4pm!

Agenda Catalyst Announcements Ions Review and Practice Test Review!

Notes Why do neutral atoms form ions?

Read This Gaining or losing electrons requires an energy exchange. Atoms will form an ion based on the least amount of energy to fill an outer shell. What are fluorine’s options for having a full outer shell? Which do you think would take the least energy?

Read This It takes less energy for lithium to lose one electron compared to the energy required to gain 7 electrons.

Sodium Ion If the sodium ion loses one electron, what charge will the sodium ion have? Why?

Chlorine Ion If the chlorine ion gains one electron, what charge will the sodium ion have? Why?

Practice An atom that gains 2 electrons will have a _____ charge because _________________. An atom that loses 2 electrons will have a _____ charge because _________________. -2 You add 2 negative charges +2 You remove 2 negative charges

Ion Practice Please finish the practice on your handout.

Whiteboard Review Practice

Whiteboard Review Practice Draw the Bohr model of Magnesium.

Whiteboard Practice Identify what element this Bohr model represents.

Whiteboard Practice What does the atomic number tell us?

Whiteboard Practice What is the charge on an ion that gains three electrons?

Whiteboard Practice Which has more neutrons: Bromine or Selenium?

Whiteboard Practice How many moles are in 9.2 x 1013 molecules of water?

Whiteboard Practice Write Uranium-239 in isotope form.

Whiteboard Practice How many moles are in 726 grams of Mercury?

Whiteboard Practice Give an example of an element, a compound, and a mixture.

Whiteboard Practice What is an isotope? What subatomic particle is different in isotopes?

Whiteboard Practice How many atoms are in 23.7 g of Cobalt?

Whiteboard Practice How many grams are in 2.11 x 1042 atoms of Xenon?

Whiteboard Practice What is the difference between a homogenous and heterogenous mixture?

Whiteboard Practice Ions have different numbers of __________ compared to neutral atoms.

Whiteboard Practice What does Calcium need to be most stable? (Think electrons!) What will its ionic charge be?

Exit Ticket What are: 3-things you feel confident about on the test? 2-things you feel you need more practice on? 1-thing you need before the test to be successful?