In discussing halogen reactivity (as covered in Core Idea), it is a common practice to argue that as you go down the Group 17 elements it becomes harder for the elements to gain an electron to form a ...
Periodic Table as Arranged by Mendelejeff ... this group and their compounds resemble each other very closely in chemical properties; in fact, it is possible to separate them only because of ...
The periodic table of elements (often known simply as the periodic table) has been helping scientists with their work for a little over 150 years. The handy visual reference guide organizes known ...
Recent research has focused on understanding the chemical behavior, electronic structure, and reactivity of these ... enhances our understanding of the periodic table but also pushes the ...
Although the Periodic Table of Elements is an impressive ... at Oak Ridge National Laboratory has successfully analyzed chemical properties of the rare earth metal some 80 years after its discovery.