# data[].attributes.body
In 1932, James Chadwick noticed an unfamiliar radiation that was produced with the atoms. He noticed this after placing a bunch of beryllium atoms with alpha particles, and later on he interpreted this radiation as being composed of particles with a neutral electrical charge and the approximate mass of a proton. This interpretation of his has led him in proving the existence of a neutron.

# data[].attributes.body
Erwin Schrödinger's Atomic Model: The Quantum Mechanical Model

# data[].attributes.body
Comparing from Bohr's model, the Quantum Mechanical model does not define the exact path of an electron, but rather, predicts the odds of the location of the electron.

# data[].attributes.body
Back in 1926, Austrian-Irish physicist, Erwin Schrödinger took the Bohr atom model one step further. He used mathematical equations to describe the likelihood of finding an electron in a certain position.

# data[].attributes.attachment_caption
Niels Bohr's Atomic Model: The Planetary Model

# data[].attributes.body
Since electrons move in definite orbits around the nucleus, much like planets circle the sun. These orbits or energy levels that Niels Bohr has adjusted, are located at certain distances from the nucleus.

# data[].attributes.body
Danish scientist, Niels Bohr proposed an improvement to the past Atomic Models. In his model that he made in 1913, he placed each electron in a specific energy level.

# data[].attributes.attachment_caption
Ernest Rutherford's Atomic Model: Nuclear Model

# data[].attributes.body
In Rutherford's nuclear atom, protons and neutrons (comprises nearly all of the mass of the atom) are located in the nucleus, which is at the center of the atom. Meanwhile the electrons are located outside the nucleus, and occupy most of the volume of the atom (which is mostly an empty space).

# data[].attributes.body
Most of the alpha particles passed through the gold foil with little or no deflection.

A few alpha particles were deflected at large angles.

A few other alpha particles bounced back.

# data[].attributes.body
This experiment of Rutherford involved firing a stream of tiny positively-charged particles at a thin sheet of gold foil (2000 atoms thick).

# data[].attributes.body
In 1908, Ernest Rutherford who is a New Zealand physicist performed his contribution by conducting the "Gold Foil Experiment" and also discovered another important subatomic particle.

# data[].attributes.attachment_caption
Joseph John Thomson's Atomic Model: Plum Pudding Model

# data[].attributes.body
He believed an atom is a positively-charged structure with negatively-charged electrons scattered about, like plum (or raisins) in a pudding

# data[].attributes.body
J.J Thomson tried applying high electric voltage at either end of the tube between two electrodes. He then observed a particle stream (ray) coming out of the negatively charged electrode (cathode) to the positive charged electrode (anode). This ray is called cathode ray.

# data[].attributes.body
The English Scientist, Joseph John Thomson, provided the first hint that an atom is made of even smaller particles back in 1897. He conducted an experiment called "The Cathode Ray Experiment" and also showed the "Plum Pudding" model for his interpretation of an atom.

# data[].attributes.body
He deduced that all elements are composed of atoms. Atoms are indivisible and indestructible particles

Atoms of the same elements are exactly alike

Atoms of different elements are different

Compounds are formed by the joining of atoms of two or more elements

# data[].attributes.body
He was an English Physicist & Chemist back in the early 1800s who proposed the first atomic theory after conducting a number of experiments. After performing these experiments, his ideas eventually led to the acceptance of the idea of atoms. He wrote this in his book, A New System of Chemical Philosophy.

# data[].attributes.body
An Ancient Greek Philosopher in 400 BCE, Democritus proposed the idea of the Atomos. It is a matter that consists of very small and indivisible objects which couldn't be broken down any further. He believed this couldn't be seen by the naked eye as it was made up of tiny particles. His ideas were rejected at first because of the opposition made by Aristotle who believed matter was made up of the four natural elements. It took about 2000 years before his concept reemerged.

# data[].attributes.body
Picture of Democritus