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406
Indivisible, Solid Sphere Model
This model is the solid sphere model which was discovered by Democritus. -
406
Democritus
Democritus adopted the atomic theory which gave information involving atoms. This related to the atomic structure because it gave a visual image of a distinguished atom which was an important step in science. He also came to the belief that all matter consists of indivisible atoms in a universe of empty spave with an infinite amount of particles differing in size and position which led to the indivisible solid sphere model we learn today. -
Antoine Lavoisier
Antoine Lavoisier founded the Law of Conservation which stated that in a chemical reaction none of the mass is lost and he discovered the element oxygen which was important in combustion. Also, he was the one that discovered that water consisted of hydrogen and oxygen. He also wrote the first chemistry textbook. -
Joseph Louis Proust
Joseph Louis Proust founded Proust's Law which is also known as the law of indefinite proportion, which stated any given compound relative quantatites never change. -
John Dalton
John Dalton's greatest contribution to chemistry was the atomic theory. This theory classified laws involving atoms such as all matter is made of atoms. This was a major step in the atomic structure.
Four Postulates:
1.All matter is made of atoms. Atoms are indivisible and indestructible.
2. All atoms of a given element are identical in mass and properties 3.Compounds are formed by a combination of two or more different kinds of atoms.
4.A chemical reaction is a rearrangement of atoms. -
Michael Faraday
He was a very influential man who discovered electro-magnetic induction, electro-magnetic rotations, the magneto-optical effect, diamagnetism, field theory and much more. Made many contributions to electricities discovery -
Henri Becquerel
He discovered Radioactivity when he decided to develop his photographic plates and realized the images were strong and clear proving that the uranium emitted radiation without an external source of energy such as the sun. -
J.J. Thomson
Joseph John Thomson (J.J.) discovered the electron and he made a guess as to what the value of the charge was. He also believed atoms were spheres consisting of positve electrons. His discovery made history in science which we know due to it's impact today. -
Plum Pudding Model
J.J Thomson discovered this model to be called the Plum Pudding model which was a positive sphere that consisted of electrons inside. -
Max Planck
He was a teacher interseted in in the nature of radiation from hot materials. In 1901 he discovered a radical new idea that energy did not flow in one packet, but was delivered in many packets. He later called this quanta. Planck later called quanta. -
Robert Millikan
Millikan worked to discover through his oil drop experiment the charge of one single electron. His experiments and discoveries opened doors in science. -
Ernest Rutherford
Ernest Rutherford discovered the model of the atom we know today where the electrons orbit around the nucleus. It is important to the atomic structure because it is known as the symbol for atoms. -
Planetary Model
The planetary model was adapted by Rutherford and consisted of electrons orbiting the nucleus like the planets orbit the sun. -
Erwin Schrodinger
Erwin Schrödinger went on to become a noted theoretical physicist and scholar who came up with a groundbreaking wave equation for electron movements. -
Electron Cloud Model
Created by Erwin Schrodinger that guessed the electrons are found on the outer cloud like region of the atomic structure. -
Lisa Meitner
She was a physicist who shared the Enrico Fermi Award in 1966, with fellow chemists Otto Hahn and Fritz Strassmann, for their discovery of uranium fission. -
Otto Hahn
A Chemist who pioneered the fields of radiochemistry and radioactivity. He won the Nobel Prize in Chemistry in 1944 for the discovery of nuclear fission -
Albert Einstein
Albert Einsteins ideas led to new ways of looking at time, space, matter, energy and gravity. His work led to important advances such as the control of atomic energy, space exploration, and applications of light. -
Niels Bohr
Bohr is best known for his research on the structure of an atom that won him a Nobel Prize and his additions to the quantum theory. His research was a great contribution to the development of the atomic structure. -
Quantam Mechanical Model
Adapted by Niels Bohr and consists of electrons as wave functions what possibly orbit around the nucleus. -
James Chadwick
Chadwick discovered the neutron in 1932. His discovery formed the base for the investigation of the tougher questions of nuclear physics. Chadwick's discovery advanced experimental work for all scientists. -
Louis de Broglie
Louis de Broglie's success came from his work with the quantum theory. He also discovered and created a thesis that all matter consists of wave properties. He inspired the start of wave mechanics with Einstein. His discovery was significant because it answered questions other scientists had involving motion of electrons and atoms. -
Marie & Perrie Curie
Marie Curie was the first chemist to win two Nobel Prizes and discovered that radioation came from atoms and not from the interaction between two molecules. Her second Nobel Prize was awarded for her discovery of radium and polonium. Her husband, Perrie Curie, her husband discovered radium and polonium alongside his wife, but also came to the conclusion that at a certain tempature substances can change which came to be known as the Curie Point. -
Glen T. Seaborg
He discovered the element that makes atomic bombs explode. And he discovered radioisotopes used to treat millions of cancer patients. -
Aristotle
Aristotle believed that everything on earth was made up of fire, water, earth, and air. Many people followed his beleifs but they were proven to be inccorct with no proof. He still added greatly to the steps of the atomic structure -
Period: to
Atomic Structure 384-1912
