2. Lewis Dot Diagrams Show the outermost(valence) electrons for an atom Ex: LiN BeO BF CNe (has an OCTET)

3. Video Link for Drawing Lewis Dot Diagrams https://www.youtube.com/watch?v=FvSinxeYW sA

4. You try…… AsHe KrAl SrBr RaCs Pb

5. PRACTICE PROBLEMS Draw the electron dot symbols for: 1. Na 2. P 3. Ar 4. S 5. Mg 6. He

6. Activity—Periodic Pyramid Color each row of your periodic pyramid the color listed below. Make sure to color starting at the Beginning of that row THROUGHOUT the End of that row. Row 1 = red (H all the way to the end) Row 2 = orange (Li through Ne) Row 3 = yellow (Na through Ar) Row 4 = green (K through Kr) Row 5 = blue (Rb through Xe) Row 6 = dark purple (Cs through Rn) Row 7 = light purple (Fr through #118) ***choose 4 DISTINCTLY different colors to color the “s” “f”, “d”, and “p” labels at the top of the pyramid

7. ***cut off all the black portion. Do not detach the base of the pyramid. Tape the sections together that say “glue/tape”. Create your pyramid!!

8. Electron Energy Levels & Sublevels Electrons are located within the atom outside the nucleus on energy levels. Within these energy levels are sublevels. Possible sublevels in order of increasing energy: s,p,d,f Elements are located within the s, p, d, and f blocks on the periodic table (this represents which sublevel these elements’ valence electrons are on) These sublevels are used to write an atom’s electron configuration

9. Electron Configurations—Rows 1-3 Show the electron arrangement within the electron cloud on certain energy levels and sublevels Ex: Hydrogen--1s 1 Helium--1s 2 Lithium—1s 2 2s 1 Beryllium– 1s 2 2s 2 Boron – 1s 2 2s 2 2p 1 Oxygen --1s 2 2s 2 2p 4 Neon—1s 2 2s 2 2p 6 You try……. (configurations & dots) Nitrogen Fluorine

10. Sodium Phosphorus You try….. (configurations & dots) Argon Sulfur Aluminum magnesium

11. Video Link for Electron Configurations Rows 1-3 https://www.youtube.com/watch?v=sD3RZpwmtCs

12. In Educreations OR MetaMojiAPP…. Write the electron configuration AND draw the electron dot for: Cl Ca N Si

13. Electron Configurations (Rows 4-5) On these 2 rows, you encounter the d sublevel The d sublevel is always minus 1 from the row it’s on For example, row 4 contains 3d and row 5 contains 4d The Lewis dot symbol will only contain the valence s and p electrons Ex: Calcium (Ca) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 Iron (Fe) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 6 Copper (Cu) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 9 Bromine (Br) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 5

14. Video Link for electron configurations (rows 4-5) https://www.youtube.com/watch?v=r85UHiMcVEU

15. You try (configurations & dots)…… Rubidium (Rb) Silver (Ag) Tin (Sn) Antimony (Sb)

16. Electron Configurations (Rows 6 & 7) On these rows you first encounter the f sublevel. The f sublevel is always minus 2 from the row it’s on. For example: row 6 contains 4f, and row 7 contains 5f The Lewis dot symbol will only contain the valence s and p electrons Ex: Europium (Eu) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 7 Tungsten (W) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 4

17. Radon (Rn) 1s 2 2s 2 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 6 Californium (Cf) 1s 2 2s 2 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 6 7s2 5f 10 You try….. (configurations & dots) Mercury (Hg) Curium (Cm) Rutherfordium (Rf)

18. Abbreviated Configurations Uses the previous noble gas written in brackets and the configuration that is only part of the row it is on This eliminates you from having to start all the way back at 1s Ex: Ca (Ar) 4s2 Ag ( Kr) 5s2 4d10