Get promethium facts. Discover the history, properties, uses, and sources of the element with symbol Pm and atomic number 61.| Science Notes and Projects
Learn about the Oddo-Harkins rule. Get its definition and learn why the universe prefers elements with even atomic numbers.| Science Notes and Projects
This is a list of chemical elements in alphabetical order. The list has the atomic number, name, and symbol of each element.| 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
Learn about Compton scattering or the Compton effect. Discover how it works and its formula, example problem, importance, and uses.| Science Notes and Projects
Californium facts: Learn about this rare radioactive element, its discovery, properties, uses, isotopes, and place on the periodic table.| Science Notes and Projects
Get the abundance of elements in the Earth's crust periodic table and list. Discover facts about element abundance in the crust.| Science Notes and Projects
Learn what mass number means in chemistry and how it differs from atomic number and atomic mass. Get examples of how to find the numbers.| Science Notes and Projects
Learn where the electrons are located in an atom and on the periodic table. Also discover the location of valence electrons.| Science Notes and Projects
Learn about subatomic particles in physics and chemistry. Discover subatomic particles in an atom and fundamental or elementary particles.| Science Notes and Projects
Get interesting plutonium facts. Plutonium is Pu with atomic number 94. Learn about the element's properties, uses, and sources.| Science Notes and Projects
Learn about the noble gas configuration of atoms. Get a list of electron configurations for all 118 elements.| 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
Learn what an atom is in science. Get the atom definition, examples, and learn about atomic structure, size, and shape.| 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 element definition in chemistry. See examples of chemical elements, learn how many there are, and see how they are identified.| Science Notes and Projects