The energy of a one-electron atom or ion is given by $ \left(-2.178 \times 10^{-18} \mathrm{~J}\right) \frac{Z^{2}}{n^{2}} $ where Z is the atomic number of the element.Which one-electron ion below would require the most energy to remove its electron?

Question

Quizplus · Accepted Answer

The energy required to remove an electron increases with the square of the atomic number (Z^2). Among the given options, the one-electron ion of element C (carbon) has the highest atomic number, thus requiring the most energy to remove its electron.

The Energy of a One-Electron Atom or Ion Is Given (−2.178×10−18 J)Z2n2 \left(-2.178 \times 10^{-18} \mathrm{~J}\right) \frac{Z^{2}}{n^{2}} (−2.178×10−18 J)n2Z2​

The Energy of a One-Electron Atom or Ion Is Given $\left(-2.178 \times 10^{-18} \mathrm{~J}\right) \frac{Z^{2}}{n^{2}}$