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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 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.
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.
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.
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.
How did Thomson know that atoms must contain particles with positive charges?
He knew that in a vacuum tube metals can be made to emit streams of negative charge which were then called cathode rays. If atoms are neutral and can produce negative charge, there must be positive charge there too.
Why cathode ray are not electro-magnetic waves?
A cathode ray is a stream of electrons, not a stream of photons like the electromagnetic wave. It's a different type of particle. The electrons don't move at light speed in a vacuum; also, they are electrically charged.
