-
John Dalton
John Dalton --- was born on September 6, 1766, in Eaglesfield, Cumberland County. Died July 27, 1844, Manchester -
Atomic theory
Dalton's Atomic Theory
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.
He died in Manchester on July 27, 1844 -
Announcement
On October 21, 1803, John Dalton gave this Society the first announcement of his famous atomic theory. -
Dmitri mendeleev
was born at Tobolsk, Siberia in 1834 and died in 1907. -
J.J tomson
Born in December 18,1856 near Manchester./ J.J. Thomson died.30 Aug 1940 -
Periodic table
Mendeleev is best known for his work on the periodic table; arranging the 63 known elements into a Periodic Table based on atomic mass, which he published in Principles of Chemistry in 1869. His first Periodic Table was compiled on the basis of arranging the elements in ascending order of atomic weight and grouping them by similarity of properties. -
Ernest Rutherford
Born at Spring Grove Nelson Province, New Zealand, 30th Aug 1871. Died October 19, 1937 -
Niels bohr
Neils Bohr was born in Copenhagen 7th Oct 1885. -
Edwin schrodinger
He was born in Vienna(12 Aug 1887). Died November 18, 1962. -
rutherford honors
rutherford Completed MA with double First Class Honours -
Dicovery
j.J. Thomson discoverd the electron.1 Jan 1897. -
The cathode ray
The cathode ray tube was invented in 1897.Thomson had an inkling that the ‘rays’ emitted from the electron gun were inseparable from the latent charge, and decided to try and prove this by using a magnetic field -
The plum pudding model
in the March 1904 The Plum Pudding Model was introduced. The basic setup of the experiment was as follows: alpha particles coming from a radioactive source were directed to a gold foil. -
The gold foil experiment
Around 1909 the 1st gold foil experiment was conducted. Rutherford began to notice that alpha particles would not always behave in accordance to the plum pudding model of an atom when fired at a piece of gold foil. -
Rutherford atomic model
Rutherford atomic model--- description of the structure of atoms proposed (1911) by the British physicist Ernest Rutherford. The model described the atom as a tiny, dense, positively charged core called a nucleus, in which nearly all the mass is concentrated, around which the light, negative constituents, called electrons, circulate at some distance, much like planets revolving around the Sun -
Institute of Theoretical Physics
(1 Jan 1921)Neils Bohr founds the Institute of Theoretical Physics which knows alot about and then becomes the director of it further on in his career. -
Nobel peace prize
(Jan 1922) Neils Bohr wins the Nobel Prize for Physics for his services in the investigation of the structure of atoms and the radiation emenating from them. In the Bohr Model the neutrons and protons (symbolized by red and blue balls in the adjacent image) occupy a dense central region called the nucleus, and the electrons orbit the nucleus much like planets orbiting the Sun. -
The thought expirement/the copenhagen interpretation
In 1935 Erwin Schrodinger proposed a famous thought experiment in which a cat was somehow both alive and dead at the same time.
The Copenhagen interpretation was first posed by physicist Niels Bohr in 1920. It says that a quantum particle doesn't exist in one state or another, but in all of its possible states at once. -
Henry Moseley (1887-1915)
Henry Moseley studied under Rutherford and brilliantly developed the application of X-ray spectra to study atomic structure.
When atoms were arranged according to increasing atomic number, the few problems with Mendeleev's periodic table had disappeared. Because of Moseley's work, the modern periodic table is based on the atomic numbers of the elements. -
Head of university
In 1863 Mendeleev was appointed to a professorship and in 1866 he succeeded to the Chair in the University.
