1. Trends In Periodic Table

2. Which Came First? Atomic theory or Mendeleev’s Period Table? If Mendeleev only had 63 elements to work with, where did the rest come from?

3. Anything You Can Do, I Can Do Better

4. Bohr-Rutherford Diagrams What do you notice? What do the roman numerals mean?

5. Gimme, Gimme! The object of the game is to trade your skittles with one another Want to end up with a multiple of 4 Can only make ONE trade so choose wisely!

6. Analysis Who was most willing to give away a skittle? Who was most willing to accept a skittle? Who was most unwilling to give away a skittle? Who was most unwilling to take a skittle?

7. Atomic Size Trends Noble gases are less likely to give/take electrons because they are the most stable – They tend to hold onto their electrons more tightly – All other elements strive to be like noble gases Alkali metals are more like to give away electrons because they want to have a full valence shell – Don’t hold onto the electrons as tightly As you move down periodic table, more shells will increase atomic radius

9. Who Talked the Most? Who was the most active in seeking more skittles? Who was the least active in seeking more skittles?

10. Reactivity Trends Noble gases are the most stable – Least reactive with other elements – Already have a full valence shell Alkali metals are most reactive – Only have one valence electron to give away to have full valence shell As you move down a group, elements become more reactive as well

12. Homework Coloring periodic table Page 199 # 2, 3