Practice makes perfect & this is the perfect short & sweet practice for your students! I use this worksheet as a way to reinforce concepts of the differences between atoms before we move on. I have organized the problems in a way that will truly test your students understanding of atomic mass, atomic number and calculations for determining protons, neutrons & electrons. I have found that the method used for shading of the protons and electrons helps students to visualize the charge of the ion and how it is determined.
Nothing fancy about this but will easily help you identify and areas you might need to go over again. It could easily be used as a quiz, homework or classwork.