Ever stop to contemplate the size of an atom or ion? Martin Rahm, Roald Hoffmann, and Neil W. Ashcroft have. For consistency’s sake, these Cornell University scientists have just completed a ...

Nucleon numbers The research team found a new way of calculating the size of atomic nuclei such as the ones represented on this grid. (Courtesy: Serdar Elhatisari) A new way of calculating the size of ...

The results are an important stress test for theories and future experiments in atomic physics. 1.97007 femtometre (quadrillionths of a metre): That’s how unimaginably tiny the radius of the atomic ...

Zirconium is a metal in group IVB of the periodic table with atomic number 40, an atomic weight of 91.22, and a density of 6.49 Mg/m 3. Its melting point is 1852 C, and it boils at 3580 C. The ...

Lithium is an alkali metal in group IA of the periodic table with atomic number 3, an atomic weight of 6.939, and a density of 0.53 Mg/m 3. Its melting point is 180.5 C, and it boils at 1330 C. The ...