Thursday October 1, 2015 TO DO RIGHT NOW:

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Presentation transcript:

Thursday October 1, 2015 TO DO RIGHT NOW: Have a seat in your old seat  Get out your HW Copy words on page 42 Page 45- Title “Magic Squares and Atomic Structure” 3. Update your table of contents HOMEWORK 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. 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=xjY5p- 1CDr8&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? ______ How many electrons? ______ How many neutrons? ______ 7 7 8

U 2 Ways to Notate an isotope 92 92 146 2.) Nuclear Symbol Example 2: 238 92 How many protons? ______ How many electrons? ______ How many neutrons? ______ U 92 92 146

Reminder: 1st level- max 2 e- 2nd level- max 8e- 3rd level- max 18 e- 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 e- 2nd level- max 8e- 3rd level- max 18 e-

Equations Atomic Number =protons A = #p+ = #e- Mass Number M = # p+ + #n0 Number of neutrons M- A = n0

Now, fill in the row for your assigned letter Now, fill in the row for your assigned letter. Then bring your model to me 

Examples Name Symbol Mass Number #p #n #e Chlorine-37 35 Cl 17 14C 6 Carbon-12 37Cl 37 17 20 17 Chlorine-35 35 17 18 17 Carbon-14 14 6 8 6 12C 12 6 6 6

Now fill in the last two columns on your isotope activity from the beginning of class. Homework: Answer questions 1-6