In this two-page activity, students color the subatomic particles for two atoms – nitrogen on page and a mystery atom on page two. After shading in the protons, neutrons, and electrons their respective colors, students superimpose a plus sign in the yellow-colored protons to symbolize their positive charge. The mystery atom has three different energy levels of electrons and students are directed to color each layer differently. From there, students count the protons to determine the atomic number. Students then count and add the number of neutrons to the proton total to ascertain the atomic mass. Students then are asked to count the number of electrons in the first, second, and third energy levels. Students use the atomic number to identify the mystery atom. Finally, students examine the Lewis symbol and read a short narrative on valence electrons before answering a few questions on covalent and ionic bond tendencies for phosphorus, the mystery atom. A two-page colored answer key is provided for the short-answer questions.