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

The number of protons in an atom is called its atomic number ... to achieve the same electronic structure as a noble gas i.e., have a full outer shell. For example an element in group 2 has ...

Why is knowing the atomic structure of molecules useful? Learn why, and how information like this about protein structure is shared through a publicly available database. Scientists use a variety ...