GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Joseph Proust
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John Dalton
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James Chadwick
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Ernest Rutherford
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Detailed explanation-1: -In 1932, Chadwick made a fundamental discovery in the domain of nuclear science: he proved the existence of neutrons – elementary particles devoid of any electrical charge.
Detailed explanation-2: -In May 1932 James Chadwick announced that the core also contained a new uncharged particle, which he called the neutron. Chadwick was born in1891 in Manchester, England.
Detailed explanation-3: -The British physicist, James Chadwick discovered neutrons in the year 1932 through the following experiment : James Chadwick fired alpha radiation at a beryllium sheet from a polonium source. This led to the production of an uncharged, penetrating radiation.
Detailed explanation-4: -Answer and Explanation: Sir James Chadwick discovered the neutron using Lord Ernest Rutherford’s experiment on subatomic particles.
Detailed explanation-5: -Before Chadwick’s discovery of the neutron in 1932, a Danish scientist by the name of Neils Bohr refined Rutherford’s model in 1913 by proposing that electrons:-orbit the nucleus without losing energy; -could move only in fixed orbits of specific energies.