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Cathode rays revealed the presence of negatively charged particles, later identified as electrons. This provided evidence for the existence of subatomic particles within the atom. Radioactivity demonstrated that atoms can decay and transform into different elements, challenging the idea that atoms are indivisible and leading to the development of nuclear theory.
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How does an atom's electrons affect its radioactivity?
An atom's electrons typically do not directly affect its radioactivity. Radioactivity is mainly determined by the nucleus of the atom, which contains protons and neutrons. The arrangement of electrons around the nucleus may play a role in the stability of the nucleus, but it is the composition of the nucleus itself that primarily determines an atom's 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.
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?
The process by which materials give off energy from a uranium atom was named radioactivity by Marie Curie in the early 20th century. She discovered that certain elements, like uranium, emit radiation spontaneously.
What did scientist understand first about the atom?
research using the cathode ray
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.
How does an atom's electrons affect its radioactivity?
An atom's electrons typically do not directly affect its radioactivity. Radioactivity is mainly determined by the nucleus of the atom, which contains protons and neutrons. The arrangement of electrons around the nucleus may play a role in the stability of the nucleus, but it is the composition of the nucleus itself that primarily determines an atom's radioactivity.
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.
Where does radioactivity start in an atom?
Radioactivity starts in an atom's nucleus, specifically when the nucleus is unstable and tries to become more stable by emitting particles such as alpha or beta particles, or energy in the form of gamma rays. This process is known as radioactive decay.
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.
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 does the electron configuration of an atom reveal?
It can reveal the number of valence electrons in the last shell.
Thomson made his discovery about the atom during an experiment using?
Cathode Rays
