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a poisonous chemical element with properties of both metals and nonmetals that is grey in color, used in industry or as a pesticide
砷
a metallic chemical element that has a red-brown color, primarily used as a conductor in wiring
铜
a metallic chemical element with a silvery-gray appearance, widely used for making tools, steel, buildings, and various industrial products
铁
a heavy soft metal, used in making bullets, in plumbing and roofing, especially in the past
铅, 重金属
a water-soluble chemical substance that contains Hydrogen and has a sour taste or corrosive feature with a PH less than 7
酸
(chemistry) a substance that causes a chemical reaction to happen at a faster rate without undergoing any chemical change itself
催化剂, 化学催化剂
a substance that is composed of only one type of atom, typically characterized by specific physical and chemical properties
元素, 物质
(chemistry) a substance that its molecules consist of two or more elements that are held together by a chemical bond
化合物, 化学物质
(chemistry) a combination of two or more substances without forming a chemical bond or any chemical reaction
混合物, 混合
to take in a liquid, gas, or other substance from the surface chemically or physically
吸附, 吸附作用
a chemical or nuclear process that is self-sustained and its products cause other processes of the same kind
链式反应
(chemistry) a process in which several chemicals combine and form different substances
化学反应
to heat a liquid and turn it into gas then cool it and make it liquid again in order to purify it
蒸馏, 提纯
(chemistry) a symbolic representation of a chemical reaction that consists of the reactants and products
方程, 化学方程式
(chemistry) a process in which several chemicals combine and form different substances
反应, 化学反应
a light silver-gray metal used primarily for making cooking equipment and aircraft parts
铝, 铝 (中文)
