صيانة الحاسوب وكيفية الفك وتجميع الحاسوب

بنبززبزيؤزسزسزيززؤزص

1. Atomic Structure

2. Science Starter • If you could see a single atom of gold (Au) and a single atom of lead (Pb), how do you think they would look different? What do you think they might have in common?

3. Learning Objectives SWBAT define the subatomic particles found in an atom and their location in the atom. SWBAT determine the number of PEN (protons, electrons and neutrons) in a neutral atom.

4. Review - What is an atom? Atom : the smallest unit of matter that retains the identity of the substance First proposed by Democratus

5. Atomic Structure Atoms are composed of 2 regions: 1.) Nucleus : the center of the atom that contains the mass of the atom 2.) Electron cloud : region tha t surrounds the nucleus that contains most of the space in the atom Nucleus Electron cloud

6. TED ED https://www.ted.com/talks/just_how_small_is_an_atom

7. How do the subatomic particles balance each other? -Atoms overall are NEUTRAL So (+) protons = (-) electrons -Neutrons have no charge and don’t have to equal anything!

8. Practice -Write down the # of p+ and e- for each element below: P: P: P: E: E: E: N: N: N: 12 12 17 17 80 80

9. Practice -Write down the # of n o for each element below: P: P: P: E: E: E: N: N: N: 24-12=12 35 -17=18 201-80=121

10. Exit Ticket 11/8/16 What is the atomic mass of the element shown? a.) 18 b.) 13 c.) 12 d.) 11 2.) How many electrons would there be in a neutral atom of the element above? a.) 6 b.) 12 c.) 6.011 d.) 18 3.) T/F: The periodic table is arranged by atomic mass 4.) T/F: Most of the mass of an element is in the electron shell. 5.) T/F: A Bohr model shows the atomic structure of an atom.

11. Bohr Model We will make a 3-D model later

12. How exactly are the particles arranged? Bohr Model of the atom: Reviewers think this could lead to misconceptions! All of the protons and the neutrons The 1 st ring can hold up to 2 e - The 2 nd ring can hold up to 8 e - The 3 rd ring can hold up to 18 e - The 4 th ring and any after can hold up to 32 e -

13. What does carbon look like? Mass # = 12 atomic # = 6 p + = 6 n o = 6 e - = 6 6 p and 6 n live in the nucleus