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Thursday October 1, 2015 TO DO RIGHT NOW: 1. 2. 3. 4. 3. Have a seat in your old seat Get out your HW Copy words on page 42 Page 45- Title “Magic Squares and Atomic Structure” Update your table of contents HOMEWORK 1. Use Video #5 – to take notes over isotopes on the back of your paper from today. Then write the paragraph at the bottom of the page. 2. Study for quiz tomorrow! (over scientists and subatomic particles) REMINDERS • Tutorials are 7:00-7:25 am and 2:40-3:00pm (quick questions only. • Get scientific calculator!!! • Check grades online! What are isotopes? https://www.youtube.com/watch?v=xjY5p1CDr8&feature=youtu.be Isotopes All LIES! Dalton’s Atomic Theory – the part that states that atoms of the same element are identical – is NOT always true Isotopes are atoms of the SAME element that have DIFFERENT numbers of NEUTRONS! Example: There are 3 types of Hydrogen #p: #p: #p: #n: #n: #n: #e: #e: #e: 2 Ways to Notate an isotope 1.) Hyphen notation Element name – mass number Example 1: Nitrogen-15 How many protons? ______ 7 7 How many electrons? ______ 8 How many neutrons? ______ 2 Ways to Notate an isotope 2.) Nuclear Symbol Example 2: 238 92 U How many protons? How many electrons? How many neutrons? 92 92 ______ 146 ______ ______ At your assigned station, you will draw and label a Bohr model of an atom. You will move around the room once finished to look at everyone else’s atoms. Reminder: 1st level- max 2 e2nd level- max 8e3rd level- max 18 e- Equations Atomic Number =protons A = #p+ = #eMass Number M = # p+ + #n0 Number of neutrons M- A = n0 Now, fill in the row for your assigned letter. Then bring your model to me Examples Name Symbol Chlorine-37 37Cl Chlorine-35 Carbon-14 Carbon-12 35 Cl 17 14C 6 12C Mass Number #p #n #e 37 17 20 17 35 17 18 17 14 12 6 8 6 6 6 6 Now fill in the last two columns on your isotope activity from the beginning of class. Homework: Answer questions 1-6