Check the RRB Group D important questions for history, geography, general science, current affairs, defence and much more, ...

Even though emeralds and rubies are very different colors, they both have the same secret ingredient in their atomic ...

Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical composition and a highly ordered ...

One feature of compounds made with transition metals is their intense colour. There are many examples in nature, including ...

Modern periodic law and present form of the ... numerical problems in organic quantitative analysis. UNIT 14: SOME BASIC PRINCIPLES OF ORGANIC CHEMISTRY Tetravalency of carbon, shapes of simple ...

Dramatic changes in physical properties occur on descending group 16 of the periodic table. Oxygen ... tellurium must be available for basic research in the laboratory and for use in industry.

February 7 is National Periodic Table Day, when we celebrate the efforts of scientists over the centuries to figure out how different elements ...

The periodic table looks complete ... current turbulent environment,” JINR lead scientist Yuri Oganessian told Chemistry World in 2023. After US sanctions, JINR “cannot cooperate with Oak ...

Or the mineral sphalerite, whose basic zinc sulfide structure can accommodate impurities of other elements, with cadmium, mercury, manganese, gallium, germanium, and indium instead of zinc ...