1. ATOMIC THEORY REVIEW

2. ATOMS !!! What are the 3 subatomic particles? Protons neutrons electrons What is ALL matter made of?

3. What are the charges of the subatomic particles? protons (+) positive neutrons (0) neutral electrons (-) negative We know that there are the same number of p + and e - in atoms on the Periodic Table… So What is the overall charge of any atom? The overall charge of any atom is NEUTRAL… the positive charge cancels out the negative charge = 0!!!

4. What are the masses (amu) of the subatomic particles? p + = 1amu n = 1amu e - = 0 amu 1.66 x 10 -27 kg = 1 amu What is this AMU stuff????? Atomic mass unit (AMU) 2.2 lbs= 1 kg

5. What are the two areas of an atom? Nucleus and electron cloud

6. Where are the p+, n, and e- located in an atom? p+ in the nucleus n in the in nucleus e- in the electron cloud

7. Nucleus Where is ALL the mass in an atom located? Where is most of the volume of an atom located? Electron Cloud

8. The nucleus contains the p+ and n… while the electrons “orbit” the nucleus in the energy rings of the e- cloud. What does a Bohr model of the atom look like?

9. So what are the charges of the different areas? 1. So what is the overall charge of the nucleus? Positive 2. So what is the overall charge of the electron cloud? Negative

10. QUICK REVIEW- ATOMS Sub-atomic particles:. particleschargeamulocationabbrev. Protons Electrons e- Neutral (0) +p+nucleus 0 1 1 neutrons Electron cloud _ nucleusnono protons, neutrons, and electrons nucleus and electron cloudParts of the atom:

11. Energy Levels of the Atom 8 e- 2e- 32e- 8 e- 18 e- 18 e- 32e- The Nucleus P+ N 0 1 st shell 7 th shell 2 nd shell 3 rd shell 4 th shell 5 th shell 6 th shell Atoms can have several energy levels. Sometimes they are also called energy rings, shells or orbits.

12. Lets take a look at the Periodic Table!

13. Burning Hindenburg

15. Bohr Model Practice 1. H 2. Be 3. Na 4. K 5. Rb 6. He 7. F 8. Cl 9. Br 10. I

16. More Bohr Model Practice 1. Fr 2. Te 3. Sn 4. Cs 5. Kr 6. At 7. Ga 8. Rn 9. Ag 10. W

17. What Bohr model patterns are you starting to see develop?  Periodic Table Patterns  The atomic number is the same number as the number of protons and electrons.  Atoms get larger as you move down and two the right on the periodic table.  As you move from left to right on the periodic table, you gain protons and electrons and neutrons.  As you go down from the periodic table, the atom gains another energy shell or orbit.

18. Valence Electrons Valence electrons are electrons in the outermost shell of an atom. They determine whether the atom will bond with another atom. How many valence electrons does lithium have here? 1 valence electron Circle the valence electrons From your warm up.