Argon is an inert gas in group VIII A of the periodic table with atomic number 18, an atomic weight of 39.948, and a density of 1.40 Mg/m 3. In the solid state it forms an fcc crystal with a melting ...

For elements in the first three periods of the periodic table (hydrogen - argon), the orbitals can simply be filled up by increasing energy energy level. A difficulty arises when we come to potassium.

Image Credit: ALIOUI MA/Shutterstock.com Using Ar as a model system ... alignment dynamics induced by intense XFEL pulses in atomic argon. It provides insights into X-ray multiphoton ionization ...