What is the best description of what Becquerel observed in his experiment?

A.stable nuclei absorbing high-energy particles as they formed less stable compositions

B.stable nuclei emitting high-energy particles as they formed less stable compositions

C.unstable nuclei absorbing high-energy particles as they formed more stable compositions

D.unstable nuclei emitting high-energy particles as they formed more stable compositions

Question

06-03-2017
Chemistry

Answered

What is the best description of what Becquerel observed in his experiment?

A.stable nuclei absorbing high-energy particles as they formed less stable compositions

B.stable nuclei emitting high-energy particles as they formed less stable compositions

C.unstable nuclei absorbing high-energy particles as they formed more stable compositions

D.unstable nuclei emitting high-energy particles as they formed more stable compositions

Verified Answer :

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Dejanras Dejanras · Answer 1 · 2019-01-25T02:37:51-05:00

The answer is: D.unstable nuclei emitting high-energy particles as they formed more stable compositions.

Those high-energy particles are alpha particles
, beta particles
, gamma radiation.

For example, the decay chain of ²³⁸U is called the uranium series.

Decay start with U-238 and ends with Pb-206. There are several alpha and beta minus decays.

Antoine Henri Becquerel (1852 – 1908) was a French physicist and the first person to discover evidence of radioactivity.

Becquerel wrapped fluorescing crystal (uranium salt potassium uranyl sulfate) in a cloth, along with the photographic plate and a copper Maltese cross.

Several days later, he discovered that a image of the cross appeared on the plate.

The uranium salt was emitting radiation.

Because of this discovery, Becquerel won a Nobel Prize for Physics in 1903, which he shared with Marie Curie and Pierre Curie.

jamuuj jamuuj · Answer 2 · 2019-01-25T04:59:02-05:00

Answer;

D.unstable nuclei emitting high-energy particles as they formed more stable compositions

Explanation;

Henri Becquerel was a French physicist best known for his work on radioactivity, for which he won a Nobel Prize in 1903.
He accidentally found that a uranium-rich mineral emitted invisible, penetrating rays that could darken a photographic plate, a process called nuclear radioactivity.
He found that radiation is associated with certain elements such as Uranium, whose nuclei is unstable. Unstable nuclei undergo radioactivity, where the emit high-energy particles to form more stable compositions.
Additionally, the process of radioactivity is not affected by factors such as temperature, pressure of ionization state of the unstable nuclei such as Uranium.