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Which scientist discovered that cathode rays are made up of negatively charged particles?
J.J. Thomson discovered that cathode rays are made up of negatively charged particles. He conducted experiments using cathode ray tubes and found that the rays were deflected by electric and magnetic fields in a manner consistent with the presence of negatively charged particles.
When Thomson held a positively charged plate near the cathode ray the beam bent toward the plate What conclusion can be drawn from this observation?
The beam bending towards the positively charged plate indicates that the cathode rays are negatively charged. This observation led Thomson to conclude that the cathode rays are made up of negatively charged particles, which we now know as electrons.
What findings led JJ Thomson to infer that particles are smaller than atoms do exist?
Particles are smaller
Why cathode ray bent toward the possitively charge plate?
electrons are not bent, they can't be as they are point particles occupying no volume. they are attracted to positive charges. the electron beam (aka cathode rays) are bent toward the positively charged plate.
What experiment evidence did Thomson use to support his hypothesis that atoms are made up of even smaller charged particles?
J.J. Thomson used cathode ray tube experiments to support his hypothesis that atoms contain smaller charged particles. He observed that cathode rays, which were streams of negatively charged particles (later known as electrons), were deflected by electric and magnetic fields, indicating that they had mass and charge. This led him to conclude that atoms were not indivisible, as previously thought, but instead composed of smaller charged components. His work ultimately contributed to the development of the "plum pudding" model of the atom.
What happened to the beam when Thomson placed a pair of charged metal plates on either side of the glass tube?
When J.J. Thomson placed a pair of charged metal plates on either side of the glass tube, the cathode ray beam (consisting of electrons) was deflected. The negatively charged electrons were repelled by the negatively charged plate and attracted towards the positively charged plate, causing the beam to bend towards the positive plate. This experiment demonstrated that cathode rays were made up of negatively charged particles, leading to the discovery of the electron.
What did thomson's cathode-ray tube experiment help scientists learn?
Thomson's cathode-ray tube experiment helped scientists understand that electrons are negatively charged particles within atoms. This experiment contributed to the development of the plum pudding model of the atom, which proposed that electrons are embedded in a positively charged sphere within the atom.
What did Thomson conclude about the particles in cathode rays?
Thomson concluded that cathode rays are made up of negatively charged particles, which he called electrons. He determined that these electrons are a fundamental component of matter and have a much smaller mass compared to atoms.
How colloids can made to settle?
Colloidal particles have ab electrical charge that will repel all other similarly charged colloidal particles. However, these charged particles will attract particles of opposite charge. Therefore, a negative colloid can be made to coagulate (begin to settle out) by adding to it positively charged particles.
Who find electron?
The electron was first discovered by J.J. Thomson in 1897 through experiments with cathode rays. He observed that these rays were made up of negatively charged particles, which he called electrons.
Which scientist did experiments involing a form of cathode ray tube?
J.J. Thomson used cathode ray tubes to prove the existence of electrons.
In thomson's experiment why was the glowing beam repelled by a negatively charged plate?
The experiment showed the relation of positive/negative charges. The beam was made of positively charged ions, which were repelled. -there is another answer to this question that says " because it was attracted to the positive charged plate" this is FALSE, this is just a person trying to make a smart remark. --------- Cathode rays are a beam of electrons; electrons are elementary particles with a negative electrical charge.
