The word atom comes from the Greek word meaning indivisible. The concept of the atom had its foundations in ancient Greece with Leucippe of Milet. In 420 B.C. his disciple Democrite of Abdere had the concept that atoms were particles in perpetual motion and were invisible because of their infinitely small size, indivisible, solid, eternal because they are perfect, surrounded by an empty space, and having an infinite number of shapes. His theory was exceptionally close to reality, being that it was 420B.C.

Today we know that each atom is made up of three parts, a proton, a neutron and an electron. These atoms combine to make compounds. The most basic atoms are called elements and cannot be broken down any more than they already are. There are currently 118 known elements 90 of them occurring naturally and the other 28 are man made. The elements combine in an infinitesimal amount of ways to make up every thing around us. Created

These particles are all of the normal particles that we find in our universe but there are other particles that exist. This set of particles is called anti-matter. Anti-matter is the exact opposite of real matter with correlating anti- spins (referring to the kinetic energy that sub-atomic particles use to spin on their own axis), and anti charges. There are anti-electrons, dubbed "positrons" because of their positive charge of +1 and anti-protons with a negative charge of -1. Anti-neutrons still have the same neutral charge but they have an inverse spin. All anti-matter particles also obey their own cp symmetry. The "c" in cp symmetry stands for conjunction of charge between two anti-particles. This means that a negatively charged particle's corresponding anti-particle will have the inverse positive charge. The "p" in cp symmetry stands for parity. This is referring to the parity between the spins in particles and corresponding anti-particles. Anti-particle aren't just anothe!

This information still doesn't explain the whole universe as a whole but scientist, every day, are making advances in relating the macro-universe to the micro-universe and one day maybe we will be able to solve the many mysteries of the universe but for now we still don't have a complete view of the universe.

There are also particles called neutrinos and are particles that are emitted by neutrons along with an electron when they change into protons in fission reactions. These particles rarely interact with matter at all because they are also so small that it would take a sheet (or better, a block) of lead a light year thick to stop just half of the neutrinos emitted by the sun. The word neutrino is Italian for "little neutron". The reason for this is that neutrinos are particles with a neutral charge just like neutrons.

The neutron is a sub-atomic particle that is found in the nucleus of the atom also. The neutron has a charge of +/-0 and is thus forth neutral. The neutron like we said earlier is a little smaller than the proton. Neutrons are also how we characterize isotopes. In a normal atom

Some common words found in the essay are:
Chemical Bonds, Hydrogen Lithium, Periodic Table, Democrite Abdere, Introduction Atoms, Brief History, negative charge, Leucippe Milet, positive charge, electrical charge, nucleus atom, outer field, neutrinos particles, cp symmetry, periodic table, Perris Davis, inverse positive charge, cp symmetry stands, chemical symbol, negative charge -1, protons atom, international chemical symbol, positive charge +1,
Approximate Word count = 1407
Approximate Pages = 6 (250 words per page double spaced)