Royal Society of Chemistry5y
Chemistry in its element: chromium
Of all chromium's natural occurrences ... neptunium - element number 93 in the periodic table. In June 1940, American physicists Edwin McMillan and Philip Abelson, working at the Berkeley Radiation ...
Princeton University10y
Chromium, Cr
Chromium is a metal in group VIB of the periodic table with atomic number 24, an atomic weight of 51.996, and a density of 7.19. It has a melting temperature of 1875 C. The electronic configuration ...
Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure
The colors of rubies and emeralds are so striking that they define shades of red and green – ruby red and emerald green. But ...
Rubies and emeralds get their colours from a common metal
Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical composition and a highly ordered ...
bangaloremirror.indiatimes1dOpinion
Why are rubies red, emeralds green?
One feature of compounds made with transition metals is their intense colour. There are many examples in nature, including ...
Royal Society of Chemistry5y
Chemistry in its element: bohrium
Instead they proposed bohrium, which became the officially recognised name in 1997. In the periodic table bohrium lies below chromium, technetium and rhenium in group 6. However, the application of ...