Electronegativity, an essential characteristic of all elements in the periodic table, measures an atom's ability to attract electrons towards itself within a chemical bond. This vital theoretical ...

A basic building block of matter. There are 118 chemical elements, 94 of which occur in nature. The additional 24 are created in labs. See rare earth elements and isotope. THIS DEFINITION IS FOR ...

Initially dedicated at the Lawrence Berkeley National Laboratory in Berkeley, California, on March 11, 2000. Rededicated at Lawrence Hall of Science in Berkeley on August 11, 2019, during the ...

THE reader's interest will be aroused even before he has opened this volume; for he will doubtless be curious to learn which members of the elemental series the author has decided to group together ...