There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...

organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number. Scientists use the periodic table to quickly refer to information ...

The efforts of microscopists have given aberration-corrected transmission electron microscopy the power to reveal atomic structures with unprecedented precision. It is now up to materials ...

An international research collaboration has overturned the long-standing belief that the atomic nucleus of lead ... our understanding of how the heaviest elements are formed in the universe.

Relative atomic mass is not the same as mass number. Mass numbers close mass numberThe number of protons and neutrons found in the nucleus of an atom. are whole numbers because they are the number ...