A halogen is a group of elements that contain fluorine, chlorine, bromine, iodine, and astatine.
Assuming you mean "halogen": 1, usually. Things like "perchlorate ion" are something else again...
sodium chloride + ammonium nitrate would resolve to ammonium chloride and sodium nitrate due to a 2 salt swip swap like commonly demonstrated in "the golden book of chemistry" the No3 and the halgen group Cl swaping out on both compounds and causing the the respective products to be sodium nitrate NaNo3 and ammonium chloride NH4Cl NaCl + Nh4No3 ----> Nh4Cl + NaNo3 };]