Which of the following statemenst is NOT true of halogens?A) Elemental halogens exist as diatomic molecules containing single covalent bonds.B) Their outermost electron configuration is: ns2np6.C) Fluorine and chlorine are gases, bromine is liquid, and iodine is solid at room temperature.D) They are strong oxidizing agents.E) Fluorine is the most reactive among them.
Question
Which of the following statemenst is NOT true of halogens?A) Elemental halogens exist as diatomic molecules containing single covalent bonds.B) Their outermost electron configuration is: ns2np6.C) Fluorine and chlorine are gases, bromine is liquid, and iodine is solid at room temperature.D) They are strong oxidizing agents.E) Fluorine is the most reactive among them.
Solution
The statement that is NOT true of halogens is B) Their outermost electron configuration is: ns2np6.
The correct outermost electron configuration for halogens is ns2np5. This configuration shows that halogens have seven electrons in their outermost shell and they need one more electron to achieve a stable electron configuration, which is why they are so reactive.
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