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Atomic Scientist Timeline

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Rachelle Alton

on 17 September 2013

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Transcript of Atomic Scientist Timeline

Atomic Scientist Timeline
Marie Curie
She studied radioactive materials ( uranium and thorium) and created two new chemical elements.
she called the fast decaying of these substances "radioactivity"
We chose her because she was one of the most important women scientists in the world.
Elmer Samuel Imes
Imes was the second african american scientist to earn a Ph.D in physics.
He studied the molecular structure of atoms through the use of infrared spectroscopy
I chose him because I found him really interesting because he verified quantum theory.
Linus Pauling
Discovered that molecules has helical shapes and he had a keen knowledge of the dispositions of various atoms
we chose him because he isnt very well know and because he discovered that molecules and atoms have different shapes
by: Rachelle, Deja and Tajwar
Modeled the atom using billiard balls. Newton suggested that atoms are held together with attractions, otherwise known as forces. He also stated that "matter is formed of solid, massy impenetrable particles”.
Isaac Newton
Created the Law of Conservation of Matter, which states that matter is conserved in a chemical reaction.
Antoine Lavoisier
The Reasoning behind choosing Sir Isaac Newton was his indication of the thought of what was soon known as an atom.
Lise Meitner
Chadwick discovered the neutron, named because of the lack of electric charge, which was previously an unknown particle in the nucleus of an atom.
James Chadwick
The reason James Chadwick's discovery was so important was because the neutron wouldn't have been identified and understood today.

Dalton's Atomic Theory stated:
that all matter is made up of small indivisible and indestructible particles called atoms.
all atoms of a given element are identical, but differ from those of any other element.
atoms are neither created nor destroyed.
John Dalton
The reasoning for choosing John Dalton was because of his contribution on introducing the atom with evidence to support his claim.
Faraday discovered that atoms have electrical charges, and the atoms contain particles which have electrical charges.
Michael Faraday
The reason for picking Michael Faraday was because his discovery led to the actual naming of positive and negative charges inside an atom.
She discovered radioactive energy
She named the process of fission
I chose her because she is jewish and i can relate to her. She also discovered fission and that's really amazing.
J.J. Thomson
Cathode Ray Tube
Anodes are positively charged electrodes.
Cathodes are negatively charged electrodes.
The reason why J.J. Thomson was chosen was because with his discovery of the Plum Pudding Model, which shows how even numbers of protons and electrons are inside of the atom.
He also differentiated and named what an alpha and beta radiation are.
Rutherford is also known for performing the first splitting of an atom.
Ernest Rutherford
The reason for choosing Ernest Rutherford was because of the great discovery on differentiating the difference between alpha and beta radiation.
Proposed the periodic law and developed the first periodic table according to the atomic weight. He left some areas for future elements to be discovered.
The reason Mendeleev was chosen was because he set the rule and base for all elements according to the atomic weight.
The reason for choosing Antoine Lavoisier was because We now understand why matter is conserved: atoms are neither created nor destroyed in a chemical reaction.
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