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The em value of cathode rays is always constant but the em value of positive rays is not constant why?
Anode rays differ from cathode rays in several aspects and their specific charge(charge/mass or e/m ratio) is an important feature. The reason lies in how anode rays are produced. Anode rays are produced when a gas at low pressure is subjected to a high voltage(10,000 Volts). Under these conditions, the atoms of the gas get ionized, i.e. they lose some electrons and thus become cations(positive ions). It is a stream of these positive ions that become 'anode rays'. However, the atomic masses of different gases are different and hence, the mass of anode ray particles varies when you use different gases in the discharge tube and hence, the charge/mass ratio also varies. Whereas, in the case of cathode rays, the cathode ray particles are nothing but electrons. Their charge and mass is constant no matter what gas you use in the discharge tube. So, their charge/mass ratio remains constant. (ANSWER BY RIZWAN FROM PAKISTAN)
What was JJ Thompson's experiment about?
Thompson's model described that every atom had an electron and he tried to incorporate the electron into the model of the atom... He prooved the Greeks wrong because they initially thought that the atom was solid.(This also prooved Dalton to be incorrect also) All in all JJ Thompson discovered the electron!
What is a fixed ratio?
a ratio that was at first incorrect but has been fixed
Who first recognized that the ratio of the number of atoms is the same as the ratio of the masses that combine?
The first person to recognize the total ratio of the number atoms is the same as the total ratio of the ratio of the mass is JOHN DALTON.This is also called the "Law of Multiple Proportion"
What is the ratio of 500 ml to 2 liters?
The ratio of 50 ml and 2 litre is?
The em value of cathode rays is always constant but the em value of positive rays is not constant why?
Anode rays differ from cathode rays in several aspects and their specific charge(charge/mass or e/m ratio) is an important feature. The reason lies in how anode rays are produced. Anode rays are produced when a gas at low pressure is subjected to a high voltage(10,000 Volts). Under these conditions, the atoms of the gas get ionized, i.e. they lose some electrons and thus become cations(positive ions). It is a stream of these positive ions that become 'anode rays'. However, the atomic masses of different gases are different and hence, the mass of anode ray particles varies when you use different gases in the discharge tube and hence, the charge/mass ratio also varies. Whereas, in the case of cathode rays, the cathode ray particles are nothing but electrons. Their charge and mass is constant no matter what gas you use in the discharge tube. So, their charge/mass ratio remains constant. (ANSWER BY RIZWAN FROM PAKISTAN)
What is the evidence that show cathode rays consists of charged particles?
One piece of evidence is the observation that cathode rays are deflected by electric and magnetic fields, indicating they carry charge. Further evidence comes from the fact that cathode rays produce X-rays when striking a target, which is consistent with the behavior of charged particles like electrons. Additionally, the ratio of the charge to mass of the particles in cathode rays was found to be the same as that of electrons.
How was the electric field used to determine the charge of the cathode ray?
The electric field was used to deflect the cathode rays in a cathode ray tube. By measuring the amount of deflection and knowing the strength of the electric field, the charge-to-mass ratio of the particles in the cathode rays could be calculated. This allowed for the determination of the charge of the particles in the cathode ray.
Why is gas obtained at the cathode double at the anode?
Gas is obtained at the cathode during electrolysis because it is the site of reduction where electrons are gained. Conversely, gas is produced at the anode because it is the site of oxidation where electrons are lost. This results in a balanced flow of electrons and the generation of gas at both electrodes.
Who discovered the charge to mass ratio for the electrons?
Millikan found the charge of an electron by his famous oil drop experiment. J J Thomson determined the specific charge of the electron. That means the ratio of the charge of an electron to its mass. With these two values one can find the mass of electron by dividing the charge value by its specific charge.
How was an electric field used to determine the charge of a cathode ray?
An electric field was used to determine the charge of a cathode ray by observing how the ray bent in the presence of the field. By measuring the amount of deflection and knowing the strength of the electric field, the charge-to-mass ratio of the particles in the cathode ray could be calculated, providing information about their charge.
How did Thomson determine that cathode rays are negatively charged?
Thomson observed that cathode rays were deflected by electric and magnetic fields in a manner consistent with them having a negative charge. He measured the charge-to-mass ratio of cathode rays and found it to be the same regardless of the material used for the electrodes, which suggested the charge was a fundamental property of the particles themselves.
What did the cathode ray tube tell us about atomic structure?
because Thomson saw the ray move from the cathode to the anode so the particles have negatively charge
What evidence convinced Thomson that cathode rays consist of negatively charged particles?
In a series of experiments in the 1890's, J.J.Thompson showed that cathode rays, or electrons, are deflected by an electric field, they are bent by a magnetic field, and that their charge to mass ratio is about 1/2000th of that of the proton. Light does not have any of these properties.
What was the scientist name who discovered the electrons charge?
The scientist who discovered the charge of electrons was J.J. Thomson. He determined the charge-to-mass ratio of electrons through his experiments with cathode rays in the late 19th century.
Which scientist performed the cathode ray experiment leading to the discovery of electrons?
Dalton performed the cathode ray experiment.
What are cathode rays made from?
Cathode rays are a stream of electrons originating from cathode and moving to an anode, when high voltage electric potential is applied to the electrodes sealed in a glass tube containing gas at low pressure.Cathode rays are stream of negativley charged electrons getting detached right from neutral molecues due to high voltage and driven right from cathode to anode.
