In an inelastic collision an electron excites as hydrogen atom from its ground state to a M-shell state. A second electron collides instantaneously with the excited hydrogen atom in the M-State and ionizes it. At least how much energy the second electron transfers to the atom in the M-state?

Question

In an inelastic collision an electron excites as hydrogen atom from its ground state to a M-shell state. A second electron collides instantaneously with the excited hydrogen atom in the M-State and ionizes it. At least how much energy the second electron transfers to the atom in the M-state?, $+3.4 \mathrm{eV}$, $+1.51 \mathrm{eV}$, $-3.4 \mathrm{eV}$, $-1.51 \mathrm{eV}$

MARKS App · Accepted Answer

Hints: $E_m=-\frac{13.6}{(3)^2}=-1.51$ Minimum energy required by electron should be $+1.51 \mathrm{eV}$

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