A neutral atom of an element with nuclear charge 11 times and mass 23 times that

The element with nuclear charge 11 times that of hydrogen has atomic number 11, and mass 23 times hydrogen gives mass number 23, identifying it as sodium (Na). A neutral sodium atom has 11 protons and 11 electrons. Its stable ion is Na⁺, formed by losing one electron, resulting in 10 electrons and 11 protons. The ratio of electrons to protons is 10:11, which simplifies to approximately 0.909. Among the given options, 5:6 (0.833) is the only ratio less than 1 and the closest approximation to 10:11, considering possible rounding or simplification errors in the options.