1. 1.Why was the use of Hydrogen filled “blimps” discontinued in the late 1930’s? It is explosive and burns like it did with the Hindenburg 2. Which metal was shown to melt in the hand? Cesium 3.Which metal was mentioned as having the highest melting temperature? Tungsten

2. 4. What scientist first developed the organization of the periodic table? 5.The vertical columns on the periodic table are called? 6.The horizontal rows on the periodic table are called? Mendeleev Groups / Families Periods

3. Xenon All are gases All are unreactive 7.Which noble gas was described as the “proverbial lead balloon?” 8.Name two things all the Noble elements have in common?

4. 9.Which alkali metal in groups one was demonstrated as the most reactive in water? Cesium Would you estimate Francium to be more or less active? More reactive

5. 10. Which non-metal is considered the “Tyrannosaurus Rex” of the element world? Fluorine Why? It reacts vigorously with most elements

6. 11.What happened to the hot diamond when it was placed on the glass of liquid oxygen? The diamond burned. It produced a gas (carbon dioxide). 12. The oxide of carbon is a (solid, liquid, or gas) at room temperature. Sand The oxide of silicon is a solid which is commonly called?

7. 13. The Periodic Law did not just bring order to the chemistry of the elements, it also helped solve one of the most fundamental scientific problems. What was the problem? The problem of the inner structure (i.e. electron configuration) of the atom.

8. Mendeleev’s Table vs Modern Periodic Table Ordered by: Increasing Atomic MassIncreasing Atomic Number Periodicity based on: Formulas of compoundsValence e - configuration SubgroupsActually split: A (s & p) / B (d) “Mixed Bag”Metals/metalloids/nonmetals “Graveyards & Junk piles” Actinides & Lanthanides (f block) Other:

9. -The Periodic Table and Periodic Law Problems Section 6.1 2-6 pg 181 & Section 6.2 8-10, 12-14 pg 186 Chapter 6