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What is an atom? Catalyst 1. What are the 3 subatomic particles? Proton, neutron, and electron

What is an atom? Catalyst 1. What are the 3 subatomic particles? Proton, neutron, and electron 2. What are the charges associated with them? Positive (proton), Neutral (neutron), Negative (electron) 3. Where are they found in the atom?

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What is an atom? Catalyst 1. What are the 3 subatomic particles? Proton, neutron, and electron

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  1. What is an atom? Catalyst 1. What are the 3 subatomic particles? Proton, neutron, and electron 2. What are the charges associated with them? Positive (proton), Neutral (neutron), Negative (electron) 3. Where are they found in the atom? Nucleus (proton and neutron), Electron cloud (electron) 11/7/11 26L continued

  2. 11/7/11 What is an atom? Learning Target (Reminder) LT #2: I can explain the different parts of an atom and where they are located. *What is an atom Powerpoint *Atom animation http://web.visionlearning.com/custom/chemistry/animations/CHE1.3-an-atoms.shtml 26R continued

  3. 11/7/11 What is an atom? Subatomic Particles Table Complete the table below. 26R continued

  4. 11/7/11 What is an atom? Subatomic Particles Table Answers: Copy/correct your answers. 26R continued

  5. 11/7/11 What is an atom? Learning Target Self-Assess LT #2: Rate yourself on a 3, 2, 1 scale. 3 is “I really know this” and 1 is “I don’t really get it.” Hold up your 3, 2, 1 with your fingers. 26L continued

  6. 11/7/11 Atomic Theory Learning Target #3 LT #3: I can describe the different atomic theories and how they have developed over time. Brainpop Atomic Model: http://www.brainpop.com/science/matterandchemistry/atomicmodel/ 27R

  7. 11/7/11 Atomic Theory Independent Reading p. 125 Read p. 125-128 and fill out the following table: 27R

  8. 11/7/11 Atomic Theory 27R

  9. 11/7/11 Atomic Theory Learning Target Self-Assess LT #3: Rate yourself on a 3, 2, 1 scale. 3 is “I really know this” and 1 is “I don’t really get it.” Hold up your 3, 2, 1 with your fingers. 27L

  10. 11/7/11 The Periodic Table Learning Target #4 LT #4: I can read and understand the periodic table of elements and explain all the different sections. Brainpop Periodic Table: http://www.brainpop.com/science/matterandchemistry/periodictableofelements/ 28R

  11. The Periodic Table Vocabulary and Reading Write the definitions of the following words, found on p. 129-137. Atomic number Isotopes Mass number Atomic mass Periodic table Period Group Chemical symbol 11/7/11 28R

  12. The Periodic Table Catalyst 1. What are the periods on the periodic table? What are the groups? Periods are the horizontal rows and groups are the columns. 2. Define atomic number and atomic mass. Atomic number is the number of protons and atomic mass is the number of protons and neutrons. 11/9/11 28L

  13. 11/9/11 The Periodic Table Learning Target #4 (Reminder) LT #4: I can read and understand the periodic table of elements and explain all the different sections. Now, please put everything away except a pencil and a separate sheet of paper. 28R

  14. IV. The Periodic Table

  15. A. The periodic table is table/chart in which the elements are arranged in the order of increasing atomic numbers. B. The periodic table was developed by a Russian chemist named Dmitri Mendeleev.

  16. C. Reading the periodic table Number of Electrons in each shell Atomic number 2 6 8 O Element symbol Element name Oxygen 15.9994 Atomicmass

  17. D. Using to periodic table • Always look at the key for each periodic table used. 1. Atomic number - is the number of protons and electrons for each atom. It is also the order in which the modern periodic table is set up. 2. . Atomic mass- is the sum of the protons and neutrons in an atom.

  18. Quick Review! • Atomic Mass: Add what two things? • Atomic Number: is the number of what two things?

  19. Quick Review! • Atomic Mass: Add what two things? Protons + Neutrons = Atomic Mass (Remember: Pete and Ned from the Atoms family!) 2. Atomic Number: is the number of what two things? Protons and Electrons (Remember: P.E.)

  20. E. The Number of Neutrons in an Atom • To find the number of neutrons in an atom use the following formula: Neutrons= Atomic Mass-Atomic Number Ex. To find the number of neutrons in a Carbon atom you would subtract the Atomic Mass (12) - Atomic number (6) this = 6 neutrons

  21. Practice finding neutrons!!! • Find the number of neutrons in the following elements: • (Lithium) Li= • (Sodium) Na= • (Potassium) K=

  22. Practice finding neutrons • Find the number of neutrons in the following elements: • Li= 6.9(round to 7)-3= • Na= 22.9(round to23)-11= • K= 39.1(round to 39)-19= Li= 4 neutrons Na= 12 neutrons K= 20 neutrons

  23. Using the electron rings • Each ring has a set amount of electrons. You cannot over fill a ring but you can under fill a ring. 2e 32e 18e 8e P6 n6 2e p n

  24. Electron Ring Practice!!! Find the electron rings of the following elements. • Li • K Hint: Find out how many electrons each element has first! (What can you look at?...)

  25. Electron Ring Practice!!! Find the electron rings of the following elements. • Li =Atomic # 3 • K=Atomic # 19 2 1e P3 n4 9e 8e 2e P19 n20

  26. VI. Families and periods A. The number of rings and number of electrons on the last ring of any given element determines it position on the period table. B. Groups- vertical columns *Similar chemical properties

  27. C. Each horizontal row on the periodic table is called a period. *Not alike, but have the same number of energy levels

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