The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...

But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can ...

After a breakdown in US-Russia relations, Riken finds itself ahead of its rivals. And Lawrence Berkeley National Laboratory ...

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 ...

Scientists have found that our bodies need 28 different elements to function properly. These are almost one-quarter of the periodic table and are mainly found in the first four periods.

In these chapter notes all important topics related to Classification & Periodicity in Properties like need to classify elements, Law of Triads, Law of Octaves, Mendeleev's Periodic Table ...