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Question
Write chemical composition of haematite. Write the names and electronic configurations of first two elements of group 17.
Solution
Haematite = Fe2O3
First two elements of group 17.
- Fluorine (F) (9) = 1s2 2s2 2p5
- Chlorine (Cl) (17) = 1s2 2s2 2p6 3s2 3p5
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