3. Metals are located to the left of stair-step line.  High density  Mostly solid at room temperature. Hydrogen is not considered a metal.  High melting point Tungsten

4.  Good conductors of heat and electricity  Shiny

5.  Ductile (able to be drawn into wire)  Malleable (able to be hammered into sheets)

6.  Lose electrons easily  Corrode

8. Nonmetals are located to the right of the stair-step line.  Dull  Poor conductors of heat and electricity  Brittle (break easily)  Low density  Low melting point  Some are solid, but many are gases, and Bromine is a liquid. Sulfur

9. Al is not a metalloid

10. Metalloids touch the stair- step line.  Solids  Shiny or dull  Ductile  Malleable  Conduct heat and electricity better than nonmetals (semiconductors) Silicon Arsenic

11.  How can you identify a metal?  What are its properties?  Can you identify the less common nonmetals?  What are their properties?  And what the heck is a metalloid?

12.  Series/periods – Rows (↔)  Groups/families – Columns (↕)

15.  Group A - › Alkali metals › Alkaline earth metals › Halogens › Noble Gases – Inert Gases

16.  Transition Elements Transition metals are fairly stable  Rare Earth Metals – Inner Transition Metals = › Actinide Series Lanthanide Series

17.  Hydrogen has characteristics of metals and nonmetals  Elements greater than 92 are man- made and radioactive

18. Student made video (Turn down volume a bit)

19.  There are several important atomic characteristics that show predictable trends that you should know.  The first and most important is atomic radius.  Radius is the distance from the center of the nucleus to the “edge” of the electron cloud.

20.  The trend for atomic radius in a vertical column is to go from smaller at the top to larger at the bottom of the family.  Why?  With each step down the family, we add an entirely new Principle Energy Level to the electron cloud, making the atoms larger with each step.

21.  The trend across a horizontal period is less obvious.  What happens to atomic structure as we step from left to right?  Each step adds a proton and an electron (and 1 or 2 neutrons).  Electrons are added to existing Principle Energy Level or sublevels.

22.  The effect is that the more positive nucleus has a greater pull on the electron cloud.  The nucleus is more positive and the electron cloud is more negative.  The increased attraction pulls the cloud in, making atoms smaller as we move from left to right across a period.

23. Trends of the Periodic Table Atomic Radius Ionization Energy Electronegativity metals/nonmetals reactivity

24. What household tool does this reaction drive?

25. Observe the chemical reaction that occurs when different metals are dipped in a solution of hydrochloric acid. Hydrochloric acid dissolves some metals to form oxidized metal chlorides and hydrogen gas, the latter of which is visible in the animation as bubbles floating to the surface. Depending on their atomic structure and how readily they give up electrons when exposed to hydrogen ions in an acidic solution, certain metals, including zinc and magnesium, corrode more easily than others.