Get nitrogen facts. Discover the history, chemical and physical properties, and uses of the element with atomic number 7 and symbol N.| Science Notes and Projects
Learn why mercury is a liquid at room temperature when most metals are solids. See how electron behavior affects melting point.| Science Notes and Projects
Learn what noble gases are, which elements are included in the group, and what properties distinguish a noble gas from other element of the periodic table.| Science Notes and Projects
This is a list of all of the diatomic elements and their common properties. Simple mnemonics for remembering them are included.| Science Notes and Projects
Get the liquid definition in chemistry and other sciences. See examples of liquids in everyday life. See what is not a liquid.| Science Notes and Projects
Hydrogen is the first element of the periodic table. These hydrogen facts include general info, history, and chemical and physical data.| Science Notes and Projects