James Chadwick

Birth/death years

• James Chadwick was born in Manchester UK on October 20, 1891
• He died July 24, 1974 in Cambridge UK.

Nationality

• English and British

Contribution

• Chadwick discovered the neutron and proved that it did exsist(
• It's a subatomic particle of about the same mass as a proton but with no
• Electric charge, but is present in all atomic nuclei(nucleus)except
• Those with ordinary hydrogen.)

The Experiment

• James Chadwick constructed an experiment where he
• Projected alpha particles(two protons and two neutrons are
• bound together) and when the alpha particles reached the
• beryllium(a chemical element with the atomic number 4)
• the beryllium became neutrons and fell on paraffin wax

Experiment continued

• Which released another type of protons which
• James Chadwick named the neutron.

Accepted to scientific community

• He discovered the neutron in 1932 and it was
• Accepted in 1935. Also he was still living
• during the time.

Fact

• James Chadwick did a lot of work and experiments
• which lead him to the discovery of the neutron.
• He also won a Nobel prize in physics in 1935.
• In 1911 he graduated from the honors school of physics.