- LônLv 710 months ago
A member of Group 7 on the periodic table. (Fluorine, chlorine, bromine, iodine, astatine.)
- davidLv 710 months ago
Halogen == Name of the group 7A or group 17 elements on the periodic table == This comes from a Latin word meaning 'SALT FORMER' == BECAUSE the most abundant of them is chlorine which forms NaCl, common table salt.
- 10 months ago
Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
- BrianLv 710 months ago
any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made.