Our understanding of the atom has changed over the past few hundred years! Read about a few different theories on the structure of an atom.

Learn the basic structure of an atom with this introductory page, complete with a fun experiment they can try at home!

All attention on atoms in this amazing activity!

Kids practice identifying solids for a lesson on the states of matter in this 1st grade physical science worksheet.

Zoom in on atoms in this informative worksheet!

Become an atomic detective and uncover the elements in this investigative worksheet!

Crunch the atomic numbers of different elements in this worksheet!