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500 BCE
The Alchemists
The Alchemists discovered atomic theory. Atomic theory is all things are made up of atoms. -
427 BCE
Plato
Plato discovered that atoms derive from five fundamental shapes. -
400 BCE
Democritus
Democritus discovered the formulation of an atomic theory of the universe. -
330 BCE
Aristotle
Aristotle started the long chain of scientists when he discovered atoms. This of course was a huge deal in science. -
330 BCE
Heraclides
Heraclides took Plato's idea that the planets followed an order and created the solar system model we use today. -
Robert Boyle
Robert discovered gas decreases with pressure and increases with less. -
Lavoisier
Lavoisier discovered indivisible atoms that have no means of separating, this was the law conservation of mass. -
John Dalton
John made the discovery that all matter was composed of atoms. He made a book about this that changed science for the good. -
Dmitri Mendeleev
Dimitri put down the symbols for the chemical elements and put them order in their atomic weights. -
The Curies
The curies, husband and wives, discovered radioactivity and radioactive elements. -
J.J Thomson
Thomson disovered that atoms were made up of smaller components. This helped scientists understand how important atoms were to science. -
Planck's Quantum Theory of Light
Planck's Quantum Theory of Light is different atoms and molecules can emit or absorb energy in discrete quantities only. Max Planck was a German theoretical physicist who discovered the equation. -
The Photoelectric Effect
The Photoelectric Effect is when something such as light hits a material and electrons are emitted. -
Albert Einstein
In 1905, Albert Einstein mathematically discovered the existence of the atom, this helped revolutionized science as we know it today. -
Robert Millikan
Robert discovered and determined the precise magnitude of an electrons charge. -
Ernest Rutherford
Ernest found that the atom is mostly made of empty space. He also found that the nucleus is positively charged and was surrounded by negatively charged electrons. This was called the gold foil experiment. -
Neils Bohr
Neils contributed to the understanding of atomic structure and quantum theory. -
Henry G.J. Mosely
Henery made a huge leap in science when he discovered atomic numbers. He was highly praised for making this discovery. -
Schrodinger Equation
The Schrodinger Equation is it predicts the future behavior of a dynamic system. It also plays a big role in newtons law of gravity. Erin Schrodinger, a German scientist, discovered and made the equation. -
Werner Heisenberg
Werner discovered the uncertainty principle, this meant that a partials position and momentum could not be known exactly. -
James Chadwick
James discovered the existence of neutrons, this made a huge leap in sciences.
