He saith unto them, Come and see. They came and saw where he dwelt, and abode with him that day: for it was about the tenth hour.
John 1:39 KJV
- Fluorine (Wikipedia)
Fluorine is a chemical element; it has symbol F and atomic number 9. It is the lightest halogen and exists at standard conditions as pale yellow diatomic gas. Fluorine is extremely reactive as it reacts with all other elements except for the light inert gases. It is highly toxic.