3+-+liggins+-+I

 IODINE! Iodine is a BLACK  substance, corrosive, and a poisonous halogen (which is family 17 on the periodic table).

Iodine is in many things like: YOGURT, MILK, EGGS, STRAWBERRIES, and CHEESE.

 3 FACTS OF IODINE  1. The name for iodine comes from the Greek word iodes which violet. Iodine gas is violet-colored.  2. Many isotopes of iodine are known. all of them are radioactive except for I-127.  3. Solid iodine is blue-black in color and shiny. At ordinary temperatures and pressures, iodine sublimates into its gas, so the liquid form is not seen. 