Awon halojin (tabi elimenti halojin) ni egbe kan lori tabili idasiko awon elimenti to ni awon elimenti marun ti won fi kemika ba ara won tan, fluorini (F), klorini (Cl), bromini (Br), iodini (I), ati astanini (At).. 
= ReTired Eighte _*Roọlọ́yàyà·ìkọ̀sẹ̀ 1Gíga 2Gíga 3Ọ̀dọ́in 4Gíga 5Gíga 6Gíga 7–ìkọ̀sẹ̀ 8ìkọlù Amẹ́ríkà gẹ́gẹ́bí ọdún.. 