How many valence electrons are present in Cl

How many valence electrons are present in Cl^– ion?

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC Geoscientist – 2021

Chlorine (Cl) has an atomic number of 17. Its electronic configuration is 1s² 2s² 2p⁶ 3s² 3p⁵. The outermost shell (n=3) is the valence shell, which contains 2 + 5 = 7 valence electrons. The Cl⁻ ion is formed when a neutral chlorine atom gains one electron to achieve a stable octet configuration. The electronic configuration of Cl⁻ becomes 1s² 2s² 2p⁶ 3s² 3p⁶. The valence shell (n=3) now contains 2 + 6 = 8 electrons.

A neutral chlorine atom has 7 valence electrons. A chloride ion (Cl⁻) gains one electron to complete its valence shell, resulting in 8 valence electrons.

Ions tend to form by gaining or losing electrons to achieve a stable electron configuration, often a full valence shell (octet rule for many elements). Cl⁻ achieves a stable octet configuration in its valence shell.

More similar MCQ questions for Exam preparation:-