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Discuss what cathode rays and radioactivity reveal about the atom?
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∙ 11y ago
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∙ 11y ago
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How is radioactivity formed?
Radioactivity occurs when some of the binding energy in an atom becomes converted into kinetic energy, resulting in the expulsion of some of the particles of the atom. And generally some energy as well.
What is the stability of an atom determined?
Radioactivity is identified with radiation detection instruments.
Who named the process by which materials give off energy of an uranium atom radioactivity?
Henri Becquerel discovered in 1896 the natural radioactivity of uranium.The word radioactivity was coined by Marie Curie after.
What did scientist understand first about the atom?
research using the cathode ray
What information do the experimental results reveal about the nucleus of the gold atom?
the nucleus contains less than half the mass of the atom
Where does radioactivity start in an atom?
radioactivity start from the nucleus of an atom which becomes unstable n emit radiation
What did radioactivity reveal about the structure of atoms?
It showed that atoms were divisible, there were subatomic particles within the atom. Atoms could change form and emit an enormous amount of energy.
What are the role of cathode tubes in atom?
cathode tubes were used to detect the particle in an atom & found that negatively charged particles(electrons) are there in an atom.
What is it called when an atom decays and become another element?
Radioactivity
How is radioactivity formed?
Radioactivity occurs when some of the binding energy in an atom becomes converted into kinetic energy, resulting in the expulsion of some of the particles of the atom. And generally some energy as well.
Spontaneous emission of radiation from an atom?
This physical phenomenon is called radioactivity.
What is the stability of an atom determined?
Radioactivity is identified with radiation detection instruments.
Who named the process by which materials give off energy of an uranium atom radioactivity?
Henri Becquerel discovered in 1896 the natural radioactivity of uranium.The word radioactivity was coined by Marie Curie after.
What did radioactivity reveal about the atom?
That some atoms are not stable, and that they release mass from their nuclei to become other isotopes or elements. Until the process of fusion was understood, nuclear decay was the only known way for one element to become another element.
Who showed that radioactivity is caused by the breakdown of one atom into another?
Ernest Rutherford
What is a cathode ray tube and what did it help to prove?
there are negative electrons on the outside of the atom
Thomson made his discovery about the atom during an experiment using?
Cathode Rays
