Which gas has the highest e/m value with respect to its anode rays? ArgonNitrogenOxygenHydrogen
WHY?
e / m ratio is charge by mass ratio. Anode rays are the positively charged nuclei of the element in the discharge tube.
It is general observation that as the molecular mass of the gas increases its e/m ratio decreases. In case of anode rays maximum value for
e/m ratio is observed in case of hydrogen gas.
Reason : Hydrogen is the only element that does not carry any neutron. In anode ray discharge it carry 1 positive charge and mass is also 1. So the e/m ratio is 1. But for other gases as the molecular mass of the gas increases, the number of neutrons also increases so charge(number of proton) by mass (number of proton + number of neutron) does not remain 1 but it becomes less than because mass is always greater than charge except for hydrogen.
It is general observation that as the molecular mass of the gas increases its e/m ratio decreases. In case of anode rays maximum value for
e/m ratio is observed in case of hydrogen gas.
Reason : Hydrogen is the only element that does not carry any neutron. In anode ray discharge it carry 1 positive charge and mass is also 1. So the e/m ratio is 1. But for other gases as the molecular mass of the gas increases, the number of neutrons also increases so charge(number of proton) by mass (number of proton + number of neutron) does not remain 1 but it becomes less than because mass is always greater than charge except for hydrogen.