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460 BCE
Democritus.
He was the firts person that used the term atom and he created the theory of the universe. -
460 BCE
Democritus.
• He was a philosopher born in Greece in 460 BCE and died in 370 BCE.
• He was the main figure of the philosophical atomism. -
John Dalton.
• He was a British chemist born in 6 of september of 1766.
• He received his early education from his father.
• He had attained a considerable scientific reputation. -
John Dalton.
He was the first men that adopted Democritus theory and conver it into the first modern atomic model. -
William Crookes.
• He was born in 17 June of 1832
• Crookes was a British chemist and physicist who attended the Royal College of Chemistry.
• He was a pioneer of vacuum tubes.
• His experiments in chemistry and physics were known for the originality of their design -
J.J Thomson.
• He was born in Manchester in 18 December 1856 and he died in 30 August 1940.
• Thomson was a physicist who is credited for discovering the
electron.
• He used the cathode ray tube in his discovery.
• When he was only 14, he entered Owens College, now the University of Manchester. -
Robert Millikan.
• He was a pysicist born in March 22 of 1868 In U.S.
• He Died in December 19 of 1953.
• He was honoured with the nobel Prize for Physics in 1923 for his study in electronic charges and the photelectric effect.
• Millikan graduated from Oberlin College. -
William Crookes.
He discovered the electron by reconstructing the cathode ray. -
Ernest Rutherford
• He was born in August 30 of 1871 in New Zealand.
• He died in October 19 of 1937.
• He won the Nobel Prize for Chemistry in 1908. -
Niels Bohr.
• He was born in October 7 1885 in Denmark.
• He died in November 18of 1962.
• Danish physicist who is known as one of the principal physicists of the 20th century.
• For his work he received the Nobel Prize for Physics in 1922. -
Henry Moseley.
• He was born in November 23, 1887, England.
• He died August 10, 1915, Gallipoli, Turkey.
• He was educated at Trinity College. -
Erwin Schrödinger.
• He was born in august 12 of 1887 in Austria.
• He died in January 4 1961 in Vienna.
• He comtributed to the wave theory of matter and to other fundaments of quantum mechanics wining the Nobel Prize for physiscs in 1933. -
James Chadwick.
• He was born in October 20 1891 in england.
• He died in July 24, 1974 in cambridge.
• He recieved the Nobel prize for physics in 1935 for the discovery of the neutron.
• Chadwick was educated at the University of Manchester. -
J.J Thomson.
He also disvered the electron by using the cathode ray tube. -
Robert Millikan.
He discovered the elementary charge of an electron using the oil drop experiment during the year 1910 -
Ernest Rutherford.
Discovered the nucleus of the atom in 1911. -
Henry Moseley.
He created the Moseley law that demonstrated that an element could be represented by an atomic number. -
Niels Bohr.
He was the first to apply the quantum concept in 1913 when he made a theory of the hydrogen atom based on energy transfer. -
Erwin Schrödinger.
He did a wave equation for electron movements in the year 1924 -
James Chadwick.
In 1932, Chadwick made a discovery in the domain of nuclear science he proved the existence of neutrons.
