SSC CHSL 2013 · Question 75 of 207
is fluorine. Fluorine is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.
Source: SSC CHSL Solved Paper 20-10-2013 (Disha Publications) · reliable-secondary
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