JAMB - Chemistry (2023 - No. 70)
Which halogen is a gas at room temperature and is pale yellow in color?
Chlorine (Cl)
Fluorine (F)
Iodine (I)
Bromine (Br)
Vysvětlení
Fluorine is a halogen that is a gas at room temperature and is pale yellow in color. Halogens are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Among these, only Fluorine and Chlorine are gases at room temperature, but Chlorine is greenish-yellow, not pale yellow.