Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and other properties, visualize trends, or …

Explore how atomic mass changes with atomic number in the periodic table of elements via interactive plots.

Sodium vapor is used in streetlights and produces a brilliant yellow light. Sodium also forms many useful compounds. Some of the most common are: table salt (NaCl), soda ash (Na 2 CO 3), baking soda …

Hydrogen is estimated to make up more than 90% of all the atoms three quarters of the mass of the universe! This element is found in the stars, and plays an important part in powering the universe …

Periodic Table Nitrogen Nitrogen is a chemical element with symbol N and atomic number 7. Classified as a nonmetal, Nitrogen is a gas at 25°C (room temperature).

Because molecules, atoms, and ions of the stable isotopes of chlorine possess slightly different physical and chemical properties, they commonly will be fractionated during physical, chemical, and biological …

26 Al is a radioactive isotope (half-life of 7.1×10 5 years) that can be detected at the ultra-trace level (attogram range; 10 −18 g levels) using accelerator mass spectrometry. 26 Al is used as a tracer to …

Molecules, atoms, and ions of the stable isotopes of copper possess slightly different physical and chemical properties, and they commonly will be fractionated during physical, chemical, and biological …

Periodic Table Potassium Potassium is a chemical element with symbol K and atomic number 19. Classified as a n alkali metal, Potassium is a solid at 25°C (room temperature).

Due to its high atomic weight, xenon ions were used as a fuel in an experimental ion engine aboard the space probe Deep Space 1. Once thought to be completely inert, xenon will form compounds, …