Atomic structure Atoms are made from ... as individual atoms not bonded to other atoms. In all other substances atoms are held together by chemical bonds, either sharing or gaining/losing electrons.

But as far as their structure is concerned, these RNAs all share the same basic single-stranded chemical structure with, in some cases, higher-order structures obtained through complementary base ...

The periodic table arranges all chemical elements in special ways. Different types of chemical bonding, and patterns and trends can be observed in their arrangement. Structure and bonding Elements ...

In contrast, for cases in which the chemical structure of a small molecule has been determined, defining natural (for a scientist) becomes easy. Whether a natural product is isolated from a native ...