science chapter 04 class 9th cbse

J. J. Thomson

Sir Joseph John Thomson (1856-1940)

Born18 December 1856Cheetham Hill, Manchester, UK

Died30 August 1940 (aged 83)Cambridge, UK

Nationality United KingdomFields PhysicsInstitutions Cambridge University

Alma materUniversity of ManchesterUniversity of Cambridge

Academic advisorsJohn Strutt (Rayleigh)Edward John Routh

Known for

Plum pudding modelDiscovery of electronDiscovery of isotopesMass spectrometer inventionFirst m/e measurementProposed first waveguideThomson scatteringThomson problemCoining term 'delta ray'Coining term 'epsilon radiation'Thomson (unit)

Notable awards Nobel Prize for Physics (1906)

THOMSON’S MODEL OF THE ATOM

Born

6 September 1766(1766-09-06)Eaglesfield, Cumberland, England

Died27 July 1844 (aged 77)Manchester, England

Notable students James Prescott Joule

Known for

Atomic Theory, Law of Multiple Proportions, Dalton's Law of Partial Pressures, DaltonismInfluences John Gough

THE STRUCTURE OF ATOM

Born30 August 1871(1871-08-30)New Zealand

Died 19 October 1937 (aged 66)

Citizenship United Kingdom

Nationality British-New Zealander

Other notable students

Mark OliphantPatrick BlackettHans GeigerNiels BohrOtto Hahn

Known for

Father of nuclear physicsRutherford modelRutherford scatteringRutherford backscattering Discovery of protonRutherford (unit)

Notable awards

Rumford Medal (1905)Nobel Prize in Chemistry (1908)Matteucci Medal (1913)Copley Medal (1922

Rutherford’s model of the atomRutherford’s model of the atom

Born

20 October 1891(1891-10-20)Bollington, Cheshire, England

Died24 July 1974 (aged 82)Cambridge, England

Citizenship United KingdomFields Physics

Institutions

Technical University of Berlin

Liverpool UniversityGonville and Caius College

Cambridge UniversityManhattan Project

Known for Discovery of the neutron

Notable awardsNobel Prize in Physics (1935)

Born

Niels Henrik David Bohr7 October 1885(1885-10-07)

Died

18 November 1962 (aged 77)

Nationality Denmark

Fields Physics

InstitutionsUniversity of Copenhagen

University of Manchester

Alma materUniversity of Cambridge

University of CopenhagenDoctoral advisor Christian Christiansen

Other academic advisors

J. J. ThomsonErnest Rutherford

Doctoral students Hendrik Anthony Kramers

The atomic number is defined as the total number of protons presents in an atom

Distribution of other 10 Atomic ElementsDistribution of other 10 Atomic Elements