Chemistry, 21.12.2019 14:31 jsh65bsbs

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

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Answer from: sonnie28

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.

Answer from: wshemekia3oyliv4

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.

Answer from: Quest

that's what i got you can count the number of atoms

Answer from: Quest

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

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What is the best description of what becquerel observed in his experiment?
a. stable nuclei a...

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