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Chemistry World
February 15, 2012
Simon Hadlington |
Consistent Avogadro number a step nearer Chemical metrologists in Canada have made the most accurate measurement of silicon's molecular weight to date in a bid to derive a consistent and internationally acceptable figure for the Avogadro constant.   |
Chemistry World
July 21, 2015
Simon Hadlington |
Refining Avogadro's number on way to new kilo A new milestone has been passed on the way to redefining the kilogram in terms of Planck's constant by 2018. |
Chemistry World
January 7, 2013
James Urquhart |
Kilogram ready to slim down for the new year UK scientists have developed a cleaning technique that could solve a long-standing puzzle in the field of metrology -- how to return the standard kilogram, against which all others are measured, to its original mass. |
Chemistry World
October 31, 2011
Simon Hadlington |
The kilogram is dead! Long live the kilogram! Delegates at the 24th Conference on Weights and Measures, held in France on 21 October, were persuaded that the existing definitions of these units were outdated and needed to be dragged into the 21st century. |
Wired
August 21, 2007
Charlie Emrich |
Aussie Researchers Cut, Grind, and Polish the Perfect Kilogram Materials scientists create the roundest object in world weighing one perfect kilogram... International System of Units Standards: Meter... Second... Ampere... Kelvin... etc. |
Chemistry World
September 2011 |
The new SI Ahead of the 24th General conference on weights and measures in October, Peter Atkins explains the benefits of the new Systeme international d' unites. |
Chemistry World
January 10, 2013
Simon Hadlington |
Quantum timepiece ticks the right boxes In a remarkable feat of quantum horology, scientists in the US have created a clock that derives its timing mechanism from nothing more complicated than the mass of an atom. The new clock could prove to be a new way to make highly accurate measurements of atomic mass. |
Wired
June 2001
Brian Alexander |
Atomic Rulers of the World Nanoscale optics, quantum computing - the battle for technology supremacy is being fought inside the labs of a national standards agency called NIST. And the new enemy is in the White House... |
Chemistry World
March 26, 2015
Matthew Gunther |
Neutron -- proton mass imbalance put on the quantum scales Scientists in Germany have calculated this value to a high level of precision and may also be able to explain why it even exists in the first place. |
Chemistry World
February 10, 2010
Simon Hadlington |
Inching towards the island of stability An international team of researchers has for the first time directly measured the mass of an element heavier than uranium. |
Chemistry World
August 10, 2012
Nina Notman |
Tweaked weighing scales help map the island of stability The mass of the heavy element lawrencium has been measured directly for the first time by German scientists. |
