Chemists strike gold, solve mystery about precious metal’s properties | Science News

SUPPORT SCIENCE NEWS

Help us keep you informed.

Real Science. Real News.


News

Chemists strike gold, solve mystery about precious metal’s properties

Predicted, actual energy needed for ionization now match

By
7:00am, January 23, 2017
gold nugget

GOLD MINE  Chemists have finally explained two of gold’s properties: the energy involved in removing or adding an electron to a gold atom. New theoretical calculations match up with values measured in experiments.

Gold’s glimmer is not the only reason the element is so captivating. For decades, scientists have puzzled over why theoretical predictions of gold’s properties don’t match up with experiments. Now, highly detailed calculations have erased the discrepancy, according to a paper published in the Jan. 13 Physical Review Letters.

At issue was the energy required to remove an electron from a gold atom, or ionize it. Theoretical calculations of this ionization energy differed from scientists’ measurements. Likewise, the energy released when adding an electron — a quantity known as the electron affinity — was also off the mark. How easily an atom gives up or accepts electrons is important for understanding how elements react with other substances.

“It was well known that gold is a difficult system,” says chemist Sourav Pal of the Indian

This article is only available to Science News subscribers. Already a subscriber? Log in now. Or subscribe today for full access.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content