Todd Helmenstine


About Todd Helmenstine

Todd Helmenstine is the physicist/mathematician who creates most of the images and PDF files found on sciencenotes.org. Nearly all of the graphics are created in Adobe Illustrator, Fireworks and Photoshop. Todd also writes many of the example problems and general news articles found on the site.

Amino Acid Word Search
Amino acids are the basic building blocks of proteins and polypeptides. The 20 most common amino acids, their structures and properties are some of the first things a new biochemistry student memorizes. This amino acid word search is a fun way to acquaint yourself with these amazing molecules.

Amino Acid Word Search   Recently updated !





Color Periodic Table with Atomic Mass
This is a periodic table with atomic mass, element name, element symbol, and atomic number. The colors represent the different element groups with a handy key below the table. Throw in a faint hexagon background and you get a nifty looking periodic table. This table is optimized for displays with […]

Periodic Table with Atomic Mass