Which is the element with atomic no. 9? Write about it.
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Which is the element with atomic no. 9? Write about it.
✓ Write well.
✓ Best answer- gets brainliest
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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.