-----------text would glitch so i added it here----------------- sulfur (part one): Sulfur has 24 isotopes currently known, the ones I chose for this project were 26,27, and 28. The electrons are the yellow dots in the rings. Protons and neutrons are included inside the smallest circle. Sulfur is used in gunpowder, fireworks, and more. Lithium (part two): Lithium was discovered in 1817 by isolating some salts. It has 7 isotopes discovered. Red circles are neutrons while the blue are protons. Yellows in the rings would be electrons. H2O (part three): H2O, or commonly known as water is a common molecule. In this model, red is electrons, yellow represents protons, and blue would be neutrons. Water takes up 75% of our earth and can be used in many ways.