News

Mendeleev’s work Here is a list of periodic table elements with their names, symbols, atomic numbers, atomic masses, number of electrons and protons in a tabular format: Atomic Number Element ...
Xenon is an inert gas in group VIII A of the periodic table with atomic number 54, an atomic weight of 131.3, and a density of 3.06 Mg/m 3. In the solid state it forms an fcc crystal with a melting ...
For example, xenon means "the stranger ... discovery of the element with atomic number 110. In accord with IUPAC procedures, the discoverers proposed a name and symbol for the element.