what is the best description of what becquerel observed in his experiment?

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What best describes the experiments of Becquerel and the Curies?

Q. Which describes the experiments of Becquerel and the Curies? Becquerel coined the term “radioactivity,” and the Curies showed that uranium requires x-rays to form radiation. Becquerel showed that uranium gave off radioactivity, and the Curies discovered other radioactive elements.

What did Antoine Henri Becquerel discover?

By accident, he discovered that uranium salts spontaneously emit a penetrating radiation that can be registered on a photographic plate. Further studies made it clear that this radiation was something new and not X-ray radiation: he had discovered a new phenomenon, radioactivity.

What was Antoine Henri Becquerel studying when he discovered radioactivity?

X-Rays

Becquerel was studying the properties of X-Rays when he discovered radioactivity.

What was becquerel studying in his lab?

In 1896 Henri Becquerel was using naturally fluorescent minerals to study the properties of x-rays, which had been discovered in 1895 by Wilhelm Roentgen. Becquerel used an apparatus similar to that displayed below to show that the radiation he discovered could not be x-rays. …

What did Henri Becquerel discover about the atom?

Like Thomson’s discovery of the electron, the discovery of radioactivity in uranium by French physicist Henri Becquerel in 1896 forced scientists to radically change their ideas about atomic structure. Radioactivity demonstrated that the atom was neither indivisible nor immutable.

How did the physicist Becquerel first observe the effects of nuclear decay?

How did the physicist Becquerel first observe the effects of nuclear decay? Becquerel was experimenting with uranium and exposed the samples to sunlight, and eventually the glowed for a while. He placed these on photographic paper (to stop sunlight from penetrating), but it was raining so he placed them in drawer.

What did Roentgen discover?

X-rays

Wilhelm Roentgen, Professor of Physics in Wurzburg, Bavaria, discovered X-rays in 1895—accidentally—while testing whether cathode rays could pass through glass.

What was Henri Becquerel known for?

For his discovery of spontaneous radioactivity Becquerel was awarded half of the Nobel Prize for Physics in 1903, the other half being given to Pierre and Marie Curie for their study of the Becquerel radiation.

What was Antoine Henri Becquerel studying when he discovered radioactivity quizlet?

The Discovery of Radioactivity. In 1896 Henri Becquerel was using naturally fluorescent minerals to study the properties of x-rays, which had been discovered in 1895 by Wilhelm Roentgen.

Where did Becquerel discovered radioactivity?

Becquerel took this as evidence that his idea was correct, that the phosphorescent uranium salts absorbed sunlight and emitted a penetrating radiation similar to x-rays. He reported this result at the French Academy of Science meeting on February 24, 1896.

What contribution did becquerel make to the study of nuclear chemistry?

Becquerel discovered radioactivity when experimenting with a fluorescent mineral that happened to contain uranium. Pierre and Marie Curie discovered that several elements exhibit this behavior and called the phenomenon radioactivity; they also discovered the radioactive elements polonium and radium.

What are Becquerel rays?

Medical Definition of Becquerel ray

: a ray emitted by a radioactive substance —used before radioactive emissions were classified as alpha and beta particles and gamma-ray photons.

What does 1 becquerel represent?

As such, 1 Bq represents a rate of radioactive decay equal to 1 disintegration per second, and 37 billion (3.7 x 1010) Bq equals 1 curie (Ci). …

Where did Henri Becquerel do his work?

He was the son of a professor of applied physics, Alexander Becquerel. He began his studies in 1872 at École Polytechnique just south of Paris. After a couple of years, he began working for the French government’s Department of Roads and Bridges.

What is the relation between Curie and Becquerel?

One curie (1 Ci) is equal to 3.7 × 1010 radioactive decays per second, which is roughly the amount of decays that occur in 1 gram of radium per second and is 3.7 × 1010 becquerels (Bq). In 1975 the becquerel replaced the curie as the official radiation unit in the International System of Units (SI).

What important discovery did becquerel make upon examining a piece of pitchblende wrapped up in paper pitchblende is a source of uranium?

The phenomenon of radioactivity, discovered (1896) by Henri Becquerel, had attracted Marie Curie’s attention, and she and Pierre determined to study a mineral, pitchblende, the specific activity of which is superior to that of pure uranium.

When did Thomson make his discovery?

1897
Thomson’s discovery of the electron in 1897 soon led to the realization that the mass of an atom……

Why did Becquerel exposed the crystals to sunlight?

Becquerel was hoping to demonstrate a link between minerals that glow when exposed to strong light and a new type of electromagnetic radiation called X-rays.

Which best describes a radioactive isotope?

A radioactive isotope, also known as a radioisotope, radionuclide, or radioactive nuclide, is any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays.

Why did Henri Becquerel win the Nobel Prize?

The Nobel Prize in Physics 1903 was divided, one half awarded to Antoine Henri Becquerel “in recognition of the extraordinary services he has rendered by his discovery of spontaneous radioactivity”, the other half jointly to Pierre Curie and Marie Curie, née Sklodowska “in recognition of the extraordinary services they …

Is Becquerel a metric system unit?

The becquerel (English: /bɛkəˈrɛl/; symbol: Bq) is the SI derived unit of radioactivity. One becquerel is defined as the activity of a quantity of radioactive material in which one nucleus decays per second.

Who discovered first xray?

W.C. Röntgen reported the discovery of X-rays in December 1895 after seven weeks of assiduous work during which he had studied the properties of this new type of radiation able to go through screens of notable thickness. He named them X-rays to underline the fact that their nature was unknown.

Who researched on radium and where?

Curies

In 1898, the Curies discovered the existence of the elements radium and polonium in their research of pitchblende. One year after isolating radium, they would share the 1903 Nobel Prize in physics with French scientist A. Henri Becquerel for their groundbreaking investigations of radioactivity.

Why was Becquerel interested in phosphorescence?

Phosphorescence. Becquerel was interested in phosphorescence. After exposure to visible light (or other radiation), some materials glow. … Question: How do ‘glow-in-the-dark’ stars work?

How many Sieverts are in a becquerel?

Conversion Equivalence

1 curie
=
3.7 x 1010 disintegrations per second
1 becquerel = 1 disintegration per second
1 millicurie (mCi) = 37 megabecquerels (MBq)
1 rad = 0.01 gray (Gy)
1 rem = 0.01 sievert (Sv)

What is the best explanation of why it was important that becquerel?

What is the best explanation of why it was important that Becquerel used a uranium salt in his experiments? Uranium atoms are radioisotopes. Which elements did the Curies discover?

Who conducted experiments with fluorescent minerals and photographic plates?

Antoine Henri Becquerel

Antoine Henri Becquerel– conducted experiments with fluorescent minerals and photographic plates.

What was unusual about the exposure of photographic plates by uranium quizlet?

What was unusual about the exposure of photographic plates by uranium? … The exposure was affected by a magnetic field.

What isotope is formed when u 238 emits an alpha particle?

thorium 234

A nucleus of uranium 238 decays by alpha emission to form a daughter nucleus, thorium 234.

How do you calculate becquerel?

The SI unit for activity is one decay per second and is given the name becquerel (Bq) in honor of the discoverer of radioactivity. That is, 1 Bq = 1 decay/s. Activity R is often expressed in other units, such as decays per minute or decays per year.

What was becquerel studying in his lab?

In 1896 Henri Becquerel was using naturally fluorescent minerals to study the properties of x-rays, which had been discovered in 1895 by Wilhelm Roentgen. Becquerel used an apparatus similar to that displayed below to show that the radiation he discovered could not be x-rays. …

What did becquerel study?

When Henri Becquerel investigated the newly discovered X-rays in 1896, it led to studies of how uranium salts are affected by light. By accident, he discovered that uranium salts spontaneously emit a penetrating radiation that can be registered on a photographic plate.

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