It is frue that an accurate table of atomic weights may sometimes be less appropriate for the calculation of analyses than an inaccurate one, for the constant errors of any one process are ...

"Neon, as has been already pointed out, consists of isotopic elements of atomic weights 20 and 22. The mass-spectra obtained when chlorine is present cannot be treated in detail here, but they ...

This table, while not so perfect as the spiral ... elements are arranged according to increasing atomic number or atomic weight. The whOle series from 1 to 92 is divided into six sections or ...

This video explains the periodic table, containing all the known elements arranged in groups and periods. Elements in the same group of the periodic table show trends in physical properties ...

This video is an interactive lesson in calculating an atom’s mass and atomic number. Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells. The numbers of ...

As plans were being drawn for a Radium Institute, Pierre Curie (a professor and man of equal genius) was run over and killed ...

Department of Chemistry, University of Warwick, Library Road, Coventry CV4 7AL, U.K.

A robot that plays table tennis put Olympian Miwa Harimoto ... such as thermometers and weight scales. But its major profit center is industrial machinery intended to automate factory production ...

Using the newly developed Bρ-defined isochronous mass spectroscopy technique, they determined the masses of several exotic atomic nuclei, including silicon-23, phosphorus-26, sulfur-27, and argon ...

A python package for accessing various properties of elements, ions and isotopes in the periodic table of elements.

The Union Public Service Commission (UPSC) conducts the National Defence Academy (NDA) twice every year. The NDA 1 ...

It’s an odd piece of kit, this stereo receiver sitting on a side table in our dining room. While most might regard it as some ...