element , atom
An atom is the smallest part of all the elements found on this planet. An atom is the basic unit just like a cell is the basic unit of life. As a cell has all the original properties of life , an atom also has all the original properties of element.
For example - A single atom of iron will show magnetic properties just like an an iron rod.
Like wise all all chemical properties of an atom are exactly similar to its element.
The smallest parts of these elements that retain their original properties are called atoms.
An atom is the smallest unit of matter which contains the properties of the chemical element. An atom consists of protons (p+) and neutrons (n0) ,which form the nucleus of the atom, and electrons (e-) which surround the nucleus.