Which of the following statements is incorrect about halogens?
Correct answer: D. All the halogens react with noble gases to form their halides
- A. All are non-metals
- B. All the halogens have electronic configuration ns²np⁵
- C. They have high electron affinity and ionization energy
- D. All the halogens react with noble gases to form their halides
Explanation
Why d is incorrect: Noble gases are notoriously unreactive due to their complete valence shells, making them resistant to forming bonds with other elements. Halogens, while highly reactive, cannot overcome the stability of noble gas electron configurations and hence don't form halides with them.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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