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Democritus
Democritus was an ancient Greek philospher who studied the Atomic Theory.The Democritus Atomic Theory states that atoms are found in everything, they may vary in size and cannot be separated or destroyed. -
Antoine Lavoiser
Antoine Lavoisier produced the first table of elements, his work contributed greatly to the study of the elements and he was known as the “Father of Modern Chemistry.” -
John Dalton
John Dalton was an English physicist, chemist and meteorologist. He developed the first useful atomic theory and was known for his research and contributions to color blindness. -
Law of Conservation of Mass
The Law of Conservation of Mass states that the mass of the product of a chemical reaction is always equal to the reactants. -
Dalton's Atomic Theory
Dalton’s Atomic Theory was proposed in 1803, it stated that chemical elements are made up of atoms, the atoms of an element are identical to its mass, atoms of different elements have different masses, atoms only combine in whole number ratios, and atoms cannot be created nor destroyed. -
Dmitri Mendeleev
Dmitri Mendeleev is a Russian inventor and chemist who created the first periodic table of elements. He used the table to predict undiscovered elements -
Robert Andrew Millikan
Robert Andrews Millikan was an American physicist. He won the noble prize for measuring the charges on an electron. -
Ernest Rutherford
Ernest Rutherford was a British was born on August 30, 1872 in New Zealand. He was a chemist and physicist who was known as the Father of Nuclear Physics, and made discoveries in the field of radioactivity and nuclear physics. -
Niels Bohr
Niels Bohr was a Danish physicist who won the Nobel Prize in 1922. He contributed to Quantum mechanics and understanding the atomic structure by proposing a model of the atom with the nucleus in the center. -
Erwin Schrodinger
Erwin Schrödinger was an Austrian physicist who developed results in regards to the Quantum Theory, he won the Nobel prize for physics in 1933 for his mathematical equation of wave mechanics -
Henry Moseley
Henry Moseley was an English physicist. He was born on November 23, 1887 and established a scientific basis of the periodic table based on sorting chemical elements. -
James Chadwick
James Chadwick was awarded for his discovery of the neutron in1932, which contributed to the question of the weight of atoms. -
cathode Ray Tube
In 1897 Karl Ferdinand Braun invented the Cathode ray tube, which is a specialized vacuum tube that produces images. It was used in all electronic television screens. -
Plum Pudding Atomic Model
Plum Pudding Atomic Model was proposed by J.J Thomson in 1897, it helped lead to the discovery of electrons. -
j.j Thomas
J.J Thomson discovered the electron in 1897 while studying rays traveling between charged metal plates in a vacuum tube. He believed the electrons were inside the atoms since they were so small. -
Electron Cloud Model
The Electron Cloud Model shows the placement of electrons and where they have been/ are going to be. It all revolves around the nucleus and resembles a cloud. -
Gold Foil Experiment
The Gold Foil Experiment was conducted in 1909 by Ernest Rutherford. It was a series of tests which consisted of shooting a positively charged helium particle at a very thin layer of gold film; this eventually led to the discovery of the nucleus. -
RutherFord Model
The Rutherford model was in response to the Plum Pudding model and stated it to be incorrect. The Rutherford model consisted of a higher charge in the center of the atom which is later named the nucleus. -
Bohr Planetary Model
Bohr Planetary Model, also known as the “planetary model” is a modification of the Rutherford model and was created by Neils Bohr. He believed that electrons travel only in certain larger orbits. -
Quantum Mechanical Model
The Quantum Mechanical Model is based on mathematics, and is more complicated than the Bohr Model and helps observe more complex atoms.
