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Henri Becquerel. Antoine Henri Becquerel ForMemRS (/ ˌbɛkəˈrɛl /; [ 3 ]French: [ɑ̃twan ɑ̃ʁi bɛkʁɛl]; 15 December 1852 – 25 August 1908) was a French physicist and Nobel laureate in Physics for the discovery of radioactivity. [ 4 ] The SI unit for measuring radioactivity, the becquerel (Bq), is named after him.
1896 – Antoine Henri Becquerel accidentally discovers radioactivity while investigating the work of Wilhelm Conrad Röntgen; he finds that uranium salts emit radiation that resembled Röntgen's X-rays in their penetrating power. In one experiment, Becquerel wraps a sample of a phosphorescent substance, potassium uranyl sulfate, in ...
The becquerel (/ ˌ b ɛ k ə ˈ r ɛ l /; symbol: Bq) is the unit of radioactivity in the International System of Units (SI). One becquerel is defined as an activity of one decay per second . For applications relating to human health this is a small quantity, [ 1 ] and SI multiples of the unit are commonly used.
The physiological effect of radium was first observed in 1900 by Otto Walkhoff, [23] and later confirmed by what famously known as the "Becquerel burn". In 1901, Henri Becquerel had placed a tube of radium in a waistcoat pocket where it had remained for several hours; a week or two after which there was severe inflammation of his skin ...
Graphic showing relationships between radioactivity and detected ionizing radiation. The International System of Units (SI) unit of radioactive activity is the becquerel (Bq), named in honor of the scientist Henri Becquerel. One Bq is defined as one transformation (or decay or disintegration) per second.
Pierre Curie (/ ˈkjʊəri / KURE-ee; [1] French: [pjɛʁ kyʁi]; 15 May 1859 – 19 April 1906) was a French physicist, pioneer in crystallography, magnetism, piezoelectricity and radioactivity. In 1903, he received the Nobel Prize in Physics with his wife, Marie Skłodowska–Curie, and Henri Becquerel, "in recognition of the extraordinary ...
Nuclear chemistry. Alpha decay is one type of radioactive decay, in which an atomic nucleus emits an alpha particle, and thereby transforms (or "decays") into an atom with a mass number decreased by 4 and atomic number decreased by 2. Nuclear chemistry is the sub-field of chemistry dealing with radioactivity, nuclear processes, and ...
In 1896, Henri Becquerel discovered that uranium salts emitted rays that resembled X-rays in their penetrating power. [28] He demonstrated that this radiation, unlike phosphorescence, did not depend on an external source of energy but seemed to arise spontaneously from uranium itself. Influenced by these two important discoveries, Curie decided ...