1. Paul is SMART! This weeks strategy is TIPs and Genre T – Title I – Information (captions, footnotes, etc.) P – Pictures Genre – what category does it fall under?

2. Example: Recognizing Energy Article What was the TIPs and genre?

3. Your turn!

4. Finally, The ATOM as we know it Unit 5: Structure of Matter

5. Size of an atom An atom is EXTREMELY small About 1,000,000 atoms can fit the inside the size of the period at the end of this sentence. a million atoms can fit in there!

6. But what is an Atom? An atom is… – The smallest form of an element All atoms of an element have the same characteristics (i.e. # of protons) – An atom has 3 sub-atomic particles Proton (+ charge) Neutron (no charge) Electron (-charge) REMEMBER, all matter is made up of atoms!

7. Atomic Mass (or the mass of an atom) The mass of an atom is mainly the mass of the protons and neutrons combined Electrons barely have a mass compared to protons and neutrons

8. Bohr Model

9. Sodium Atom (Na)- electron cloud model

10. How do the sub-atomic particles compare? Sub-atomic particle chargelocationRelative mass Proton neutron electron

11. Practice test question: What is the smallest unit of an element that still has the properties of that element? A.an atom B.a compound C.an electron D.a molecule