n.卤素

The halogens form a group on the periodic table, positioned below the noble gases.
氟、氯、 bromine、iodine和砹这些元素在元素周期表中位于惰性气体的下方。
Fluorine is the most reactive of all the halogens, easily combining with other elements.
氟是最活泼的卤素，能轻易与其他元素形成化合物。
Chlorine gas was used as a chemical weapon during World War I.
一战期间，氯气被用作化学武器。
Bromine water is commonly used to test for starch in cooking.
溴水常用于检测烹饪中的淀粉。
Iodized salt is an essential dietary supplement containing iodine, a halogen.
加碘盐是一种含有碘（一种卤素）的必需营养补充剂。
Halogens have a characteristic yellow or orange color in their compounds.
卤素化合物通常呈现出黄色或橙色。
The halogen exchange reaction is a common chemistry experiment to demonstrate halogen reactivity.
卤素置换反应是展示卤素活性的常见化学实验。
The halogens' electronegativity increases from fluorine to iodine.
从氟到碘，卤素的电负性逐渐增强。
The halogens form acids when combined with hydrogen, like hydrochloric acid.
卤素与氢结合会形成酸，如盐酸（氢氯酸）。
Halogenation reactions are important in organic chemistry for synthesizing various compounds.
卤化反应在有机化学中很重要，用于合成各种化合物。