He

=Helium=
 * Name:**


 * Origin of name:** Greek word for Sun (helios).


 * Discovered by:** Norman Lockyer & Edward Frankland


 * Date of Discovery:** 1868


 * Isotopes:** There are 8 known isotopes, but only He - 3 and He - 4 are stable.


 * Group:** Noble Gases


 * Atomic Weight:** 4.0026


 * Number:** 2


 * Symbol:** He


 * Interesting Fact:** Accounts for 24% of the elemental mass of our galaxy.

@http://apod.nasa.gov/apod/ap010120.html
 * Visual that represents this element:**

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 * Multimedia that represents this element:**

As a class, hypothesize and test how many balloons it would take to make diffrent objects leave the ground, i.e. penny, pencil, hair clip, etc.
 * What lesson or lab would you use to illustrate this element to a class?**