In this paper a discussion is given of the methods of identifying isotopes with the mass-spectrograph and the difficulties of securing reliable abundance measurements are pointed out. A new ...

Thank you for bringing to my attention the recent International Union of Pure & Applied Chemistry report “Atomic weights of the elements 2009” (C&EN, Dec. 20 ...

Elizabeth Williams receives funding from the Australian Research Council. If you’ve ever studied a periodic table of the elements (see below), you’re probably already aware that this table reveals a ...

For the first time those little numbers that appear beneath some of the commonest elements in the periodic table boxes are about to change from a single value to an interval of numbers An ...

Researchers have created three never-before-observed isotopes of magnesium and aluminum. The results not only stake out new territory on the nuclear landscape, but also suggest that variants of ...

Five isotopes: PTB's ion traps (top right) and the PENTATRAP Penning trap mass spectrometer at MPIK in Heidelberg (bottom left) were used to obtain insights into the differences between ytterbium ...

A mole is a measurement of a ‘batch’ of particles. It is easier to describe the number of moles of a substance rather than the number of atoms as atoms are very small. Relative atomic mass is the ...

Our body and the matter around us is composed of chemical elements mainly created in stars via nuclear reactions and complex nuclear reaction networks. To understand these processes, we need to know ...

Get the CBSE Class 9th Science chapter, Atoms and Molecules: Important topics and questions to prepare for CBSE Class 9 Science Examination, 2017-2018. This will provide you with a very clear idea ...