1. ~ Which element is your favorite? ~ Why?
Warm Up
~ Which element is your favorite? ~ Why?

2. Chemical Symbols
The element names can be very long to write over and over.
Scientist have agreed on a system of symbols to represent the elements.
Some of these symbols have 1, 2 or 3 letters.
The first letter is ALWAYS capitalized and the others (if there are any) are ALWAYS lowercase.

4. AFM image of silicon, obtained with a qPlus force sensor with a single crystal silicon tip. Image size 3.3 nm x 3.3 nm. [Ann. Phys. (Leipzig) 10, 887 (2001)].