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Chemistry Power Point Presentation

Power Point Presentation

OnDiscovery of Neutron

James Chadwick Group

By Given

IX CBSE

Group Members:

Y.Naveen

I.Keerthana

A.Bhargav TejaG.Azad

Discovery of neutron

Sir James Chadwick(20 October 1891 – 24 July 1974) was an English physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932. In 1941, he wrote the final draft of the MAUD Report, which inspired the U.S. government to begin serious atomic bomb research efforts. He was the head of the British team that worked on the Manhattan Project during the Second World War. He was knighted in England in 1945 for his achievements in physics.

NeutronsElectron

Proton

Introduction

NeutronsNeutron was discovered by sir James Chadwick in the year of 1932.Neutron was present in nucleus.Neutron was same mass and size of proton.But it is neutrally charged.

History 1930 Bothe & Becker

performed an expt. Neutron is neutral and

causes no ionization and cannot be detected in a cloud chamber

Chadwick smashed alpha particles into beryllium, a rare metallic element, and allowed the radiation that was released to hit another target: paraffin wax. The experiment results showed a collision with beryllium atoms would release massive neutral particles, which Chadwick named neutrons.

DISCOVERY OF NEUTRONS

Neutrons

Nuclear Properties

Atomic masses are denoted by the symbol u.1 u = 1.66054 × 10−27 kg = 931.49 MeV/c2

Both neutrons and protons, collectively called nucleons, are constructed of other particles called quarks.

Experiment

Sir James Chadwick

Noble Prize

After discovery the Neutron

got

Bibliographyhttps://en.wikipedia.org/wiki/Discovery_of_the_neutron

http://ansnuclearcafe.org/2011/10/19/pioneers102011/

http://chemistry.bd.psu.edu/jircitano/neutron.html

Thank you

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