An atom is the smallest unit into which matter can be divided without the release of electrically charged particles.
It also is the smallest unit of matter that has the characteristic properties of a chemical element.
The atom is the basic building block of all matter.
Atoms are very small, they are smaller than anything that we can imagine or compare with.
More than millions of atoms when stacked would make a layer barely as thick as a sheet of paper.
Most of the atom is empty space.
The rest consists of a positively charged nucleus of protons and neutrons surrounded by a cloud of negatively charged electrons. More…