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John Dalton
first Scientist to explain the behavior of atoms, measurement of weight wise. He is moslty known for his atomic threory, which says that elements are composed of extremely small particles called atoms. Atoms of the same element are identical in size, properties, and mass. Atoms cannot be created or destroyed, atoms of different elements combine in whole number ratios to form compunds. In chemical reactions, atoms are combined, seperated, or they are rearranged. -
Antione Henri Becquerel
His earlierst work had to do wiht the plane polarization of light, also the phenomenon of phosphorence and the absorption of light by crystals. Becquerel studied the connection between x-rays and naturally occuring phosphorescence. -
JJ Thompson
-Discovers the electron, proposes the plum pudding model of an atom using the cathode ray tube. The atom is nuetral and the electrons are embedded in a sphere of a positive charge. The cathode ray tube is a glowing beam of light that follows an electrical discharge in a powerful vacuum tube. He determined that everything was made up of tiny particles that happen to be much smaller than atoms. -
Ernest Rutherford
1908 Nobel Prize winner for chemistry. In 1911, even though it could not be proven whether it was positive or negative, he speculated that atoms are changed by the nuclues. Rutherford made the Gold Foil Experiment and in 1917 was credited for splitting the atom. The chemical element Rutherfordfordium (Element 104) was named after him in 1997 -
Robert Milikan
-He discovered the mass and change of the electron, through his oil drop experiment. He obtained the exact value of Planck's constant too, he won the Nobel Prize in Physics in 1923 -
Neils Bohr
- He proposed that electrons circle the nucleus in circular paths at certain distances from the nucleus. Every orbit of electrons has a specefic shell or energy. His research led hi to theorize that atoms give off electromagnetic radiation, resluting in electrons jumping to different orbit levels.
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Henry Moseley
Moseley's law is an empirical law concerning the characteristic x-rays that are emitted by atoms. The law was discovered and published by the English physicist Henry Moseley in 1913. Henry was also credited for coming up with the Atomic Number. -
Albert Einstein
1921 Nobel Prize winner. Einstein is most well known for his mass-energy equivalence formula E = MC2 which people call the most famous equation. In 1917, Einstein used the general thoery of relativity to model the universe. -
Lois de Broglie
In 1924, de Broglie theorized that all matter has wave properties. De Broglie won the nobel prize for Physics in 1929. He experimented with the wave-like of metter in 1927.
Fun Fact: His full name is Lois Victor Pierre Raymond, 7th duc de Broglie -
Werner Heisenburg
In 1927 Heisenburg published his uncertainty principle. He made important contributions to the theroies of the hydrodynamics of turbulent flow as well as the atomic nucllues, ferromagnetism, cosmic rays, and sub-atomic particles. Heisenburg was awarded the Nobel Prize in Physics during 1932 -
Erwin Schrodinger
-Erwin Schrodinger wasd an Austrian Physicist Nobel Prize Winner in 1933 who developed a number of fundamental results in the field of Quantum Throey. Which formed the base of Wave Mechanics: He formulated the wave equation and revealed the identity of his development of the formalism and matrix mechanics.
-it was formulated in 1925, and published in 1926 by the Austrian Physicist Erwin Schrodinger. -
Erwin Schrodinger
He wrote an equation that determines the probabliity of the location of electrons known as the quantum mechanical model. -
James Chawick
-He discovered the nuetron, in contrast with the alpha rays which are charged. He contributed to the creation of the atomic bomb, by preparing the way for the fission of Uranium - 235.