Chemists Orchestrate the Molecular Union of Two Single Atoms

Published: April 27, 2018, 4:30 p.m.

The main act of Kang-Kuen Ni\u2019s experiment could fit on the tip of a needle\u2014and it happens in a fraction of a second. The Harvard chemist takes two individual atoms, a sodium and a cesium, each about 10,000 times smaller than a bacterium. Then, very carefully, she brings them together to become a single molecule: sodium cesium. It\u2019s an unlikely pairing.