1. Catalyst Finish these sentences: Elements are… I THINK atoms are…

2. Homework Time

3. Unit 1 – Atomic Theory and the Periodic Table Death by Element

4. Who’s in Charge?

5. It takes 31 cuts to get to the size of the atom! It is 0.0000007 mm!

6. CutsSize (mm)Reference 0280N/A 1140Child's hand 270Fingers 335Watch 417.5Keyboard keys 64.375Poppy seeds 81.09375Thread 120.068359375Human Hair 140.017089844Width of paper 180.001068115Bacteria 190.000534058Visible light waves 241.66893E-05Membranes 311.30385E-07Size of the atom!

7. Lecture 1.1 – Introduction to the Atom

8. Today’s Learning Target LT 1.1 – I can identify the size, location, and mass of the three subatomic particles found in the atom.

10. Size of the Atom The atom has a diameter between 0.1 – 0.5 nm Point of reference: A basketball has a diameter of 234,500,000 nm

11. Three Types of Subatomic Particles All atoms contain the following subatomic particles: 1.Protons 2.Neutrons 3.Electrons

12. Protons Protons are found in the nucleus of an atom. The nucleus is located in the center of the atom. Protons have a positive charge. We say that their charge is +1

13. Neutrons Neutrons are found in the nucleus of an atom. Neutrons do not have a charge. They are neutral James Chadwick discovered the neutron in 1932!

14. Mass of Protons and Neutrons Protons and neutrons have the same mass. Each subatomic particle has a mass of 1 amu. – amu = atomic mass unit

15. Electrons Electrons are found in the electron cloud. The electron cloud surrounds the nucleus of an atom. Electrons have a -1 charge

16. Mass of Electrons Electrons have a mass that is 0.00054 amu. Electrons do not contribute to the weight of an atom.

18. Neutral Like the car gear, like water, like switzerland! To be neutral, the positives and negatives must cancel out! Neutral Tweet! Equal nmbr of protons and electrons #Chemswag #Learning #MrAstorIsABoss The resulting charge is zero!

19. SUMMARIZE

20. Collaborative Station: Death by Element Reading Complete the reading with your table You must answer all questions

21. Exit Ticket Subatomic Particle SizeChargeLocation Proton Neutron Electron

22. Rate Yourself Based on the exit ticket and your current level of understanding, rate yourself 1 – 4 on LT 1.1

24. Closing Time No homework!