This quick worksheet was created for students to practice their skills using their periodic table and distinguishing between atomic number, atomic mass, protons, neutrons, and electrons. I like to use this as a formative assessment at the end or beginning of a class period. I even turn it into a race. The answer key is included on the last page. This is practice meant to be coupled with the rest of my Intro to Chemistry Curriculum, preferably used after going through the Intro to Chemistry Power Point (which includes student guided notes).