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SIZIF [17.4K]
2 years ago
14

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

Chemistry
2 answers:
myrzilka [38]2 years ago
5 0

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.


Contact [7]2 years ago
5 0
<h3><u>Answer</u>;</h3>

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

<h3><u>Explanation</u>;</h3>
  • <u>Henri Becquerel</u> 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.
  • <em><u>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.</u></em>
  • <em><u>Additionally, the process of radioactivity is not affected by factors such as temperature, pressure of ionization state of the unstable nuclei such as Uranium.</u></em>
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uranium atoms each have 92 protons. how many protons does each u238 atom have? a. 92 b. 146 c. 238 d. 330
Brilliant_brown [7]
Number of protons as stated in the question = 92.

a. 92
4 0
3 years ago
What two chemical elements make up the majority of our sun
Vsevolod [243]
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8 0
3 years ago
Read 2 more answers
2. How many grams of water can be heated from 20.0 oC to 75oC using 12500.0 Joules?
kenny6666 [7]

Answer;

  = 0.054 kg or 54 g

Explanation;

Using the equation; Q = mcΔT where Q is the quantity of heat transferred, m is the mass, c is specific heat of the substance, ΔT is delta T, the change in temperature.  

ΔT = 75 - 20 = 55 C.  

Solve the equation for m  

m = Q/ cΔT

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4 0
3 years ago
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The formation of iodine is described by the following chemical equation:
olga nikolaevna [1]

Answer:

N2O2(g) +O2(g) ===> 2NO2(g)

Explanation:

For a nonelementary reaction, the reaction equation is described as the sum of all the steps involved. All these steps constitute the reaction mechanism. Each step in the mechanism is an elementary reaction. The rate law of the overall reaction involves the rate determining step (slowest step) in the reaction sequence.

Now look at the overall reaction 2NO(g) + O2(g) ---------> 2NO2(g)

The two steps in the mechanism are

2NO(g) --------->N2O2(g) (fast)

N2O2(g) +O2(g) -------> 2NO2(g) (slow)

Summing all the steps and cancelling out the intermediate N2O2(g), we obtain the reaction equation;

2NO(g) + O2(g) ---------> 2NO2(g)

Hence the answer.

7 0
2 years ago
When you are converting grams to moles , are you multiplying or dividing ?
Effectus [21]
When you are converting grams to moles, the operation that you will be doing is dividing by the molar mass to obtain the amount of moles of the given sample.
4 0
3 years ago
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