The element with the electron configuration 1s²2s²2p⁶3s²3p⁵ is A)fluorine. B)chlorine. C)carbon. D)potassium. E)sulfur.

Question

Quizplus · Accepted Answer

The electron configuration given belongs to chlorine. The fact that it has the 3p sublevel filled with one electron and the 3s sublevel filled with two electrons is a characteristic of a halogen, which chlorine is. Additionally, the configuration shows the presence of 17 electrons, which matches the number of protons and the atomic number of chlorine.

The Element with the Electron Configuration 1s2 2s2 2p6 3s2

The Element with the Electron Configuration 1s²2s²2p⁶3s²