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History of the atom

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Khayla Mosby

on 25 October 2016

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Transcript of History of the atom

Thomas
Sir Joseph John Thomas discovered the electron in atoms (1897). Thomson atomic model was the earliest theoretical description of the inner structure atom.
Ernest Rutherford
In 1908 Rutherford was awarded a Nobel Prize.
He was awarded this prize because of "his investigations into the disintegration of the elements, and the chemistry of radioactive substances".
John Dalton
Electron
1. Who discovered it?
J.J Thomas
2. Describe the structure of the model.
It looks similar to a small circular ball with a negative symbol. e-
3. When was it discovered?
1897
4. Where was it discovered?
United Kingdom,
5. What did the discoverer do to gather evidence for this model?
J.J Thomas did a series of experiments on the cathode.
6. What effect did this model have on the world’s understanding of
the atom?
This showed us that all atoms are made up of a nucleus and electrons.
Nuclear Atom
1. Who discovered it?
Ernest Rutherford
2. Describe the structure of the model?
Tiny, dense, positively charged core called a nucleus. That was also the mass of the object.
4. When was it discovered?
1911
5. Where?
New Zealand
6. What did the discoverer do to gather evidence for this model?
He did an experiment called the "Gold Foil Experiment"
7. What effect did this model have on the world’s understanding of
the atom?
The experiment showed us how to count individual particles and the number of protons which equals the mass.
ATOMIC THEORY
1. Who discovered it?
John Dalton
2. When was it discovered?
1803
3. Where was it discovered?
United Kingdom
4.Describe the structure of the model.
A sphere
5. What did the discoverer do to gather evidence for this model?

He used patterns within circles to find the different elements.
6. What effect did this model have on the world’s understanding of
the atom?
It explained why each gas behaved differently in a mixture.
Quantum Mechanics
Bohr Model
1. Who discovered it?
Niels Bohr
2. Describe the structure of the model.
small, positively charged nucleus surrounded by orbiting electrons.
3. When was it discovered?
1766
4. Where?
Denmark
5. What did the discoverer do to gather evidence for this model?

6. What effect did this model have on the world’s understanding of
the atom?
Scientist
ATOMS
History Of The Atom
chemistry- Per 1 Kiara Roane #25
history of atoms research project 10/18/16

Niels Bohr
Quantum Mechanical
http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1908/rutherford-bio.html
Dr. Bohr was awarded the Nobel prize in Physics 1922. "He was awarded for investigating the structure of the atoms and of the radiation emanating from them".
https://www.nobelprize.org/nobel_prizes/physics/laureates/1922/bohr-bio.html
Born October 7th, 1885
August 30, 1871
Dr. Dalton is the creator of the atomic theory . He was born September 5, 1766
https://www.britannica.com/biography/John-Dalton/Atomic-theory
https://www.britannica.com/science/Thomson-atomic-model
J.J Thomas was born December 18, 1856
Describes the behavior of matter and light on the atomic and subatomic scale. The model is the most advanced and accurate model of the atom, used by scientist today.
1.Who discovered it?
Albert Einstein

2. Describe the structure of the model
the P- orbitals has the touch the x axis.

When was it discovered?
1905

Where?
United Kingdom

What did the discoverer do to gather evidence for this model?

What effect did this model have on the world’s understanding of
This helped the world understand ultraviolet rays

https://www.britannica.com/science/quantum-mechanics-physics
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