Atom

An atom is the defining structure of an element, which cannot be broken by any chemical means.Atoms's are basic building blocks ofmatter .
An atom's structure has never been observed through naked eyes or even indirectly. But through experiments Scientists have been able to tell the inside structure of an atom . A typical atom contains protons ,neutrons and electrons ; except hydrogen which contains no neutrons. Protons are positively charge , electrons have negative charge while neutrons have no charge. Protons and Neutrons are about the same in size and an electron is about 2000 times smaller than both. Electrons are held towards the nucleus due to electromagnetic force .
A group of atoms can remain with each other, together, by forming bonds which is known as Chemical bonding. 
There are currently 118 known types of atoms. Atoms differ in sizes, affinity and charge-capacity. This can be easily analysed through a periodic table .
==Periodic Table Elements==
Each element of the periodic table is made of atoms but it depends on the amount of protons in an atom as an example Hydrogen is one on the periodic table it contains one proton, A gold atom is 79 on the periodic table it has seventy-nine protons and  Lawrencium is 103 on the periodic table and its atom contains 103 protons.
The elements arrangement in a periodic table is a function of their periodicity by their atomic number(number of protons).
Category:Chemistry