Elements in the Human Body and Periodic Table

Elements are the smallest units of matter that cannot be broken down further by chemical processes. Scientists know 118 elements, but not all of them occur naturally. Only a small number are essential for life, and living matter depends mostly on carbon, nitrogen, hydrogen, and oxygen.

The period...

At the fundamental level, all matter is composed of molecules made up of different chemical elements.

Elements are pure substances that constitute only one type of atom.

The periodic table is a standard reference in chemistry wherein the elements are arranged according to their increasing atomic number.

The specific symbol u...