An electron can be added to a halogen atom to form a halide ion with

Assessment: JAMB UTME - Chemistry - 2004 Subject: Chemistry

Question 1 Report

An electron can be added to a halogen atom to form a halide ion with
Answer Details
When an electron is added to a halogen atom, it gains one electron to its outermost shell (valence shell) which is now fully occupied, and becomes a negatively charged ion known as a halide ion. Halogens have 7 valence electrons, therefore, the addition of one electron would result in a halide ion with 8 valence electrons, making it more stable. Thus, the correct answer is "8 valence electrons".
Read lesson note on Atomic Structure And Bonding (JAMB)
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