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Jan 1, 1499
Democritus birth
Democritus wan born in Greece in 380 B.C. He was the apprentice of Leucippus. He was the original creator of the atomic theory -
Jan 1, 1500
Democritus
Democritus was the creator of what was the start of the atomic theory. He created the atomic idea while cutting an apple in half until he could no longer cut it. He stated that " There only two things in the universe, the void, and the atoms that inhabit it. NOTE: Democritus was born in 380 -
Period: Jan 1, 1500 to
Atomic Theory
This Timeline represents the breakthroughs in atomic theory. As you can see democritus creatd the idea of atoms, but until the late 1800s no significant discoveries were made. It has been over 50 years since the last major atomic discovery -
John Dalton Birth
John Dalton was a chemist, He was born on September 6, 1766 in Eaglesfield, England. He was the first scientist in the 1800’s to explain atoms in the ways of measurements of weight. In 1803 he showed the concept of Dalton’s Law of Partial Pressure. Dalton later died on July 26, 1844 in Manchester, England. -
John Dalton's Atomic Theory
John Dalton’s Atomic Theory says that atoms are unable to be divided, nor destroyed. All atoms of a given element are similar in size and properties. He said that all compounds are made of two or more different kinds of atoms. Also, a chemical reaction is just the rearrangement of atoms. -
J J Thomson Born
J J Thomson was born on December 18th, in 1856.
Later on Thomson died in August at the age of 83, in 1940 on August 30th. J J Thomson was fully named Joseph John Thomson. He was born in England. His parents were also successful people in business. -
Period: to
JJ Thomson Time Span
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Rutherford's Birth
Ernest Rutherford was born on August 30th, in 1871. Handed his first science book at the age of 10 which change almost everything for him and his future. He discovered an atomic theory. Later died in October 19th, in 1937. -
Niels Henrik David Bohr born
Niels Henrik David Bohr was born o October 7, 1885. His father (Christian Bohr) was a Professor of Physiology at Copenhagen University. His mother was Ellen, née Adler . His brother was Harald, the future professor of mathematics. -
Erwin Schrodinger Born
Schrödinger was born in Vienna, Austria, to Rudolf Schrödinger and Georgine Emilia Brenda (daughter of Alexander Bauer, Professor of Chemistry. He was their only child. His mother was half Austrian and half English; his father was Catholic and his mother was Lutheran. Despite being raised in a religious household, he called himself an atheist. However, he had strong interests in Eastern religions. -
JJ Thomson Descovery of Atomic Theory
Thomson, in 1897, was the first to suggest that the fundamental unit was more than 1,000 times smaller than an atom, suggesting the subatomic particle now known as the electron. Thomson discovered this through his explorations on the properties of cathode rays. Thomson made his suggestion on 30 April 1897 following his discovery that Lenard rays could travel much further through air than expected for an atom-sized particle. -
Ernest Rutherford
The birth of the discovery of Rutheford's atomic theory was born in 1911. He discovered the atomic theory and explains it to be sub atoms together. These sub atoms were protons and electrons, the were both peices that put this discovery together, into making the consistency of the atomic theory. The atomic theory discovered in 1911, changed many things for Rutherford and others. -
Niels Bohr Created the Bohrs Model
Neils Bohr found out that electrons orbit the nucleus at set distances. When an electron changes orbits, it does so in a sudden quantum leap. The energy difference between the initial and final orbit is emitted by the atom in bundles of electromagnetic radiation called photons. -
Schrodinger Atomic Model
The first publications of Schrödinger about atomic theory and the theory of spectra began to emerge only from the beginning of the 1920s, after his personal acquaintance with Sommerfeld and Wolfgang Pauli and his move to Germany. In January 1921, Schrödinger finished his first article on this subject, about the framework of the Bohr-Sommerfeld effect of the interaction of electrons on some features of the spectra of the alkali metals.
