Get interesting oxygen facts. Discover chemical and physical data and general information and history of the element with atomic number 8.| Science Notes and Projects
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
Fluorine is the ninth element of the periodic table. These fluorine facts contain chemical and physical data along with general information and history.| Science Notes and Projects
Chlorine is the 17th element of the periodic table. These chlorine facts contain chemical and physical data along with general information and history.| Science Notes and Projects
Carbon is the sixth element of the periodic table. Get carbon facts, including chemical and physical data, general information, and history.| Science Notes and Projects
Find the perfect free printable periodic table for any need. Download printable periodic tables as PNG or PDF. Many styles are available.| Science Notes and Projects
Get the alphabetical list of element symbols for all the chemical elements on the periodic table and a free PDF list to download and print.| Science Notes and Projects
Helium is the second element of the periodic table. These helium facts contain general information, history and chemical and physical data.| Science Notes and Projects
Get the definition of an isotope. See examples of isotopes and learn the difference between an isotope and a nuclide of an element.| Science Notes and Projects
Learn what an electron is. Get its definition, learn where to find electrons, and understand the properties of this type of matter.| Science Notes and Projects
Learn what a proton is, where it's found in the atom, and get interesting facts about protons.| Science Notes and Projects
Get the definition of a neutron in chemistry in physics. Learn interesting facts about neutrons and their role within an atom.| 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
Learn about deuterium. Get facts about what it is, its properties, uses, and sources. See whether it's radioactive.| Science Notes and Projects
Learn about the types of chemical bonds and get examples of ionic, covalent, metallic, and hydrogen bonding in chemistry.| Science Notes and Projects
Get facts about tritium, the heaviest hydrogen isotope. Learn about its sources, uses, radioactive decay, and natural abundance.| Science Notes and Projects
Get the definition of matter in science and see examples of different forms of matter. Contrast matter with dark matter.| Science Notes and Projects
Learn the difference between and atom and an ion. Get definitions and examples of atoms and ions in chemistry.| Science Notes and Projects