A nonmetallic largely pentavalent heavy volatile corrosive dark brown liquid element belonging to the halogens
Else clues• Element from sea water
• Element that's liquid at room temperature
• Element used in fire retardants
• Fire retardant chemical
• Liquid at room temperature
• No. 35 on the periodic table
• One of the halogens
• Third-lightest halogen
• Volatile liquid element
• Found in sea water