Winter Chemistry Periodic Table puzzle coloring activities. Need an easy sub plan, an enrichment activity or a fun activity to use the day before a break? Students love using their periodic table to color and reveal a hidden picture. The puzzles reveal a mystery picture according to the number of valence electrons, periodic family names, ionic charge, metal/ nonmetal, element /compound / mixture and the number of protons, neutrons and electrons in an element. Easy way to provide enrichment