Among the following the false statement is (1) Compared to...

Among the following the false statement is (1) Compared to mass of lightest nucleus the mass of electron is only about $1 / 1836$. (2) The ratio of $e / m$, i.e., specific charge for a cathode ray is constant. (3) Among $\mathrm{He}^{2+}, \mathrm{H}^{+}, \mathrm{He}^{+}$ and $\mathrm{H}$ the species having the highest $e / m$ ratio is $\mathrm{He}^{2-}$, (4) The $e / m$ for positive rays in comparison to cathode rays is very low,

Among the following the false statement is
(1) Compared to mass of lightest nucleus the mass of electron is only about $1 / 1836$.
(2) The ratio of $e / m$, i.e., specific charge for a cathode ray is constant.
(3) Among $\mathrm{He}^{2+}, \mathrm{H}^{+}, \mathrm{He}^{+}$ and $\mathrm{H}$ the species having the highest $e / m$ ratio is $\mathrm{He}^{2-}$,
(4) The $e / m$ for positive rays in comparison to cathode rays is very low,

Key Concepts

Electron Mass Relative to Nucleus

This concept addresses the fact that electrons are extremely light compared to nucleons (protons and neutrons), with the electron mass being roughly 1/1836 of that of a proton. This ratio is fundamental when comparing the masses of subatomic particles and understanding the dynamics within the atom.

Specific Charge (e/m) of Particles

The specific charge is defined as the ratio of a particle’s charge to its mass. It is a key parameter in analyzing how charged particles behave under electric and magnetic fields, especially in experiments involving cathode rays and ion deflection, and is crucial for techniques such as mass spectrometry.

Ionization and Charge States

The process of ionization results in particles having different charge states depending on the number of electrons removed or added. The variation in charge states affects the mass-to-charge ratio (e/m), which is important when comparing different species of ions. This concept is central in understanding the properties of various ions in experiments and applications.

Comparison of e/m Values in Different Species

This concept involves comparing the specific charge ratios among different particles or ions, such as electrons, positive ions, and various charged atoms. It highlights how differences in mass and charge across species lead to distinctive behaviors in electromagnetic fields, which is critical for interpreting experiments involving particle acceleration and deflection.

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